Micro-listening
Adverbs of reason: link cause and result
How do therefore and because show cause and result?
Therefore, consequently, and thus introduce a result, while because introduces a cause or reason; so is more natural in casual speech. The timetable changed; therefore, we moved the appointment. Use a semicolon or full stop before therefore, but do not use a semicolon before a because clause.
Key points
- Therefore introduces the result of a previous cause.
- Because introduces the direct reason for an event.
- Consequently highlights an unavoidable or practical outcome.
- Thus and hence sound formal in workplace writing.
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At a glance
| Form | Use it for | Example |
|---|---|---|
| therefore | Introduces a result, often in formal writing. | The lift failed; therefore, we used the stairs. |
| because | Introduces the reason something happened. | We used the stairs because the lift failed. |
| consequently | Highlights a direct or inevitable consequence. | The test failed; consequently, production stopped. |
| thus or hence | Shows a formal logical result or deduction. | Costs fell; thus, prices became lower. |
| so | Connects cause and result in casual speech. | The café was full, so we ate outside. |
The full explanation
Adverbs of reason and result show that a second statement follows logically from a first statement. When you use words such as therefore, consequently, thus, or hence, you present an outcome or decision based on facts your listener already heard. In contrast, because introduces the cause itself. Knowing whether you are presenting the origin of an event or its outcome determines which word you should choose.
The delivery truck broke down; therefore, the morning orders arrived late.
Why it works: The broken truck is the known cause. Therefore introduces the late delivery as the outcome.
3 more examples
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The manager approved overtime because the warehouse received sixty extra crates.
Because introduces the cause of the overtime rather than the result.
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Heavy rain flooded the access road. Consequently, our technician rescheduled the repair.
Consequently begins a new sentence to explain the outcome of the flooded road.
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The client requested an earlier launch date; thus, our team adjusted the production schedule.
Thus shows the direct operational change that followed the client request.
Read the full guide
Try the listening exercise
Separate the Cause from the Result
Before choosing a linking word, decide which event happened first and caused the other. When you share two linked events, one event provides the reason and the second event describes the outcome. If you state the reason first, a transition word signals that the listener should expect an outcome. Confusing these roles can reverse your message and confuse your coworkers or clients.
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The computer server lost power. Therefore, our staff logged out of the system.
Why it works: The power cut happened first and caused the staff to log out.
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Our staff logged out of the system because the computer server lost power.
Why it works: The sentence starts with the outcome and uses because to name the reason.
Your turn
In the sentence 'The supplier increased prices; therefore, the cafe adjusted its menu,' which part is the result?
Answer: The cafe adjusted its menu
Show the answer
Answer: The cafe adjusted its menu
The price increase is the trigger that caused the cafe to change its menu. Therefore points forward to this resulting action.
Introduce an Outcome with Therefore
Use therefore when your listener already understands the background fact and you want to present the logical outcome. This adverb often appears in workplace emails, meeting notes, and project summaries where clear logical steps matter. You must place therefore before the result, never before the underlying reason. Placing it in front of the reason creates an incorrect statement.
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The inventory count was inaccurate. Therefore, we paused all shipping orders.
Why it works: The pause in shipping is the business decision resulting from the bad count.
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The flight was delayed; therefore, Maria missed her morning presentation.
Why it works: Missing the presentation directly follows the delayed flight.
You can practise this again in Bring about and Choose the verb that fits the subject.
Your turn
Which sentence uses therefore correctly to introduce a logical outcome?
Answer: The presenter felt sick; therefore, the workshop ended early.
Show the answer
Answer: The presenter felt sick; therefore, the workshop ended early.
The illness is the cause that occurred first, and ending the workshop early is the outcome that follows therefore.
State a Direct Cause with Because
When you want to explain why something took place in a single fluid sentence, use because. Unlike result adverbs, because connects directly to the cause itself. You can place the because clause at the beginning of the sentence or at the end without using semicolons. This flexibility makes because ideal when explaining reasons behind decisions or delays to customers.
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Our team rescheduled the call because the client needed more preparation time.
Why it works: Because introduces the specific reason for moving the call.
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Because our inventory arrived early, we fulfilled five extra customer requests.
Why it works: The cause clause appears first, followed by a comma and the main outcome.
Your turn
Choose the sentence that correctly explains a delay using because.
Answer: We missed our morning connection because the local train arrived twenty minutes late.
Show the answer
Answer: We missed our morning connection because the local train arrived twenty minutes late.
Because correctly joins the main result clause to the clause stating the reason without redundant adverbs or broken prepositions.
Connect Closely Related Sentences with a Semicolon
When two complete thoughts are closely linked in meaning, you can join them in a single sentence using a semicolon before the result adverb. Follow the adverb with a comma to separate it from the result clause. A semicolon shows readers that the two ideas belong together as one continuous thought, which keeps professional writing compact and organized.
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The budget report was incomplete; therefore, the finance director requested revised figures.
Why it works: The semicolon links the two independent clauses without creating a run-on sentence.
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The store ran out of printer paper; consequently, staff purchased boxes nearby.
Why it works: The semicolon before consequently and comma after it maintain correct formal boundaries.
Your turn
Which sentence shows the correct punctuation for linking clauses with therefore?
Answer: The software license expired; therefore, we renewed it this morning.
Show the answer
Answer: The software license expired; therefore, we renewed it this morning.
A semicolon marks the end of the first complete clause, and a comma sets off therefore from the second clause.
Begin a New Sentence with a Result Word
Starting a new sentence with Therefore or Consequently gives your message a deliberate, measured pace. Put a period at the end of the cause statement, capitalize the result adverb, and place a comma directly after it. This structure works especially well when either the cause or the result sentence contains multiple details that would make a single combined sentence too long.
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Several key participants were stuck in regional transit. Therefore, the organizer postponed the opening speech.
Why it works: A period divides the detailed cause from the outcome, improving readability.
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Our office heating system broke during the frost. Consequently, everyone worked remotely on Friday.
Why it works: Consequently opens the second sentence to announce the workplace response.
Your turn
Why would a writer split a cause and result into two distinct sentences using a period?
Answer: To keep long, complex explanations easy to read and grammatically clear
Show the answer
Answer: To keep long, complex explanations easy to read and grammatically clear
Dividing detailed thoughts with a period prevents sentences from becoming overly long and difficult to parse.
Select Consequently or Thus in Formal Reports
In formal reports, choosing between consequently, thus, and hence depends on what kind of result you are describing. Consequently stresses an outcome or direct consequence that followed inevitably from prior actions. Thus points to how an event came about or explains an immediate logical conclusion. Both words belong in formal documents, while everyday conversations usually sound more natural with simpler phrasing.
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The technician skipped the safety inspection; consequently, the machine overheated by noon.
Why it works: Consequently emphasizes the negative outcome caused by skipping the inspection.
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The company lowered production costs; thus, retail prices dropped across the region.
Why it works: Thus shows the logical outcome of the cost reduction.
Your turn
Which word best emphasizes an inevitable outcome or consequence in a formal workplace report?
Answer: Consequently
Show the answer
Answer: Consequently
Consequently fits formal workplace reporting and draws attention to an outcome resulting from prior actions.
Switch to So in Casual Conversation
While adverbs such as therefore and thus look natural in writing, they can sound stiff during casual spoken English. In everyday dialogue, English speakers use the coordinating conjunction so to express the exact same relationship. Using so maintains the cause-then-result order without making your speech sound rehearsed or academic. Use a simple comma before so when joining two short clauses.
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It started raining on our walk, so we ducked into a nearby cafe.
Why it works: So provides a smooth, conversational bridge from the rain to the shelter.
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The printer is out of ink, so I will email you the document instead.
Why it works: So explains the practical everyday adjustment without sounding overly formal.
Your turn
Which sentence sounds most natural in casual spoken English with a coworker?
Answer: I lost my badge, so security issued a temporary pass.
Show the answer
Answer: I lost my badge, so security issued a temporary pass.
So is the standard conversational choice for expressing results in daily spoken English.
Avoid Comma Splices at Sentence Boundaries
A frequent error among intermediate writers is connecting two complete sentences with only a comma before therefore. This error is known as a comma splice. Because therefore is an adverb rather than a coordinating conjunction like and or but, it cannot join independent clauses on its own. You must place either a semicolon or a period before the adverb to keep the sentence structure sound.
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Incorrect: The delivery arrived late, therefore we rescheduled the review.
Why it works: Joining two full clauses with only a comma before therefore creates a comma splice.
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Correct: The delivery arrived late; therefore, we rescheduled the review.
Why it works: The semicolon correctly separates the two independent clauses.
Your turn
How can you fix the error in 'The store closed early, therefore we could not buy supplies'?
Answer: Replace the comma before therefore with a semicolon or period
Show the answer
Answer: Replace the comma before therefore with a semicolon or period
Replacing the comma with a semicolon or period properly separates the two independent clauses and eliminates the comma splice.
Common mistakes
What learners often say, what to say instead, and why.
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Not this:
The road was closed, therefore we took another route.Say: The road was closed; therefore, we took another route.
A comma alone cannot join two complete clauses before therefore.
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Not this:
We cancelled the picnic because; the weather was poor.Say: We cancelled the picnic because the weather was poor.
Because directly introduces its reason and does not take a semicolon.
-
Not this:
The train was late; because, I missed the interview.Say: I missed the interview because the train was late.
Because introduces the cause and does not need a semicolon or comma after it.
Use it naturally
How people really use “therefore”
Formal Fits reports, emails to clients and speeches.
Words it often goes with
- therefore decidedWe wanted to learn about space and therefore decided to visit the science museum.
- therefore neededThe group had twelve people and therefore needed two guides.
- therefore choseMaya enjoys painting and therefore chose the art museum.
What people also say
- “It was raining, so we stayed inside.” instead of “It was raining; therefore, we stayed inside.”So sounds more natural in casual conversation.
Before you go
Remember this
Identify whether your next clause states a cause or an outcome before you speak or write. Use because to explain the cause directly. Use therefore or consequently to announce the outcome, and protect sentence boundaries with a semicolon or period. For casual speaking, so delivers the same result connection with less formality.
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Heavy rain blocked our highway; therefore, our bus arrived an hour late.
Therefore introduces the late arrival as a consequence of the blocked highway. The semicolon connects the two complete clauses.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- In bus arrived, listen for bu-sarrived. The final s connects to the start of arrived.
- In American English this t sounds like a quick, soft d.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- In bus arrived, listen for bu-sarrived. The final s connects to the start of arrived.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- In bus arrived, listen for bu-sarrived. The final s connects to the start of arrived.
- In American English this t sounds like a quick, soft d.
Listening 2 of 4
Listen, then type what you hear. Replay as often as you need.
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Our bakery closed early because our main oven broke.
Because introduces the broken oven as the direct explanation for closing early.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- In main oven, listen for mai-noven. The n connects to the start of oven.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- In main oven, listen for mai-noven. The n connects to the start of oven.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- In main oven, listen for mai-noven. The n connects to the start of oven.
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Listening 3 of 4
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Several crew members caught a seasonal flu this week; consequently, our managers moved our opening ceremony to next Monday.
Consequently introduces the delayed ceremony as the outcome of several workers falling ill. A semicolon connects the independent clauses.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- In next Monday, listen for nex(t) Monday. The t may drop out before Monday.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- A small word like this is said quickly and softly, not as written.
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High winds damaged our storage roof early yesterday morning. Consequently, our warehouse crew moved twenty pallets into building six before noon. Our morning deliveries paused because our safety inspectors examined each aisle. Our regional supervisor arrived by car around one, and our regular shipping schedule resumed soon afterwards.
Consequently introduces the pallet relocation after the storm damage, while because explains why deliveries were paused.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- In pallets into, listen for pallet-sinto. The final s connects to the start of into.
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Say it your way
Speak for 30 to 60 seconds from memory. You and a friend can visit either a science museum or an art museum on vacation. Choose one. Explain your interests, your reasons, and what you will do there.
Use: therefore because
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Hear how someone else might say it
I would choose the science museum because I love learning how things work. My friend enjoys space and wants to learn more about the moon. The science museum has a whole floor about space; therefore, it would be a good choice for both of us. First, we could look at the rockets and try some activities. Then we could watch a film about the planets. I would also like to visit the room about electricity. We could take photos and talk about our favorite parts over lunch.
Try once more and answer this: Which part of the museum would you visit first?
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Heavy rain blocked our highway; therefore, our bus arrived an hour late.
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Put it in your own words
- I used “therefore”.
- It is about my life, not the lesson’s example.
- I read it once aloud to check it sounds right.
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Questions about "Adverbs of reason: link cause and result"
Can I put a comma before therefore when connecting two sentences?
No, using only a comma before therefore to connect two independent sentences creates a comma splice. Because therefore is an adverb rather than a coordinating conjunction, you must place a semicolon or a period before it. In formal writing, place a comma after therefore to separate it from the result clause.
The road was icy; therefore, the bus moved slowly.
The road was icy. Therefore, the bus moved slowly.
What is the difference between therefore and so in daily communication?
Both words show a result coming from a previous cause. However, therefore is formal and primarily appears in business reports, essays, and written documentation. So is a conjunction used constantly in everyday conversation. While therefore takes a semicolon or period, so connects clauses with a simple comma.
We completed the audit early, so our manager let us go home.
The company completed the audit early; therefore, management approved the release.
Can I begin a sentence with the word because?
Yes, you can begin a sentence with because, as long as you complete the full thought with an independent clause. When the because clause comes first, put a comma at the end of that clause before writing the main result. In casual speech, people sometimes say because on its own as a short answer, but full sentences require a result.
Because our train arrived early, we grabbed a cup of coffee before the meeting.
How do thus and hence differ from therefore in workplace writing?
Thus and hence are formal connectors that indicate results or logical deductions. Thus often means 'in this way' or 'as a direct consequence,' while hence traditionally means 'for this reason' or 'from here.' Both words sound elevated and are much less common in casual emails than therefore.
The software updates automatically; thus, our team saves hours of manual maintenance.
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