Micro-listening
Subordinating conjunctions: connect your ideas clearly
The short answer
A subordinating conjunction creates a relationship of dependence. One part of your sentence carries the primary information, while the joined clause adds necessary context such as cause, timing, or contrast. For instance, knowing that a meeting was canceled is helpful, but adding why it was canceled gives the listener the complete picture.
Key points
- Choose your conjunction based on the relationship between your thoughts: because for causes, although for surprises, when for schedules, and if for conditions.
- When the dependent clause starts the sentence, insert a comma after it.
- Always verify that your sentence contains at least one independent clause that can stand alone.
This lesson has 5 stages. You can stop at any time and continue later.
Stage 1 of 5
Understand
What it means, when to use it, and mistakes to avoid.
Examples
Because our flight was delayed by two hours, we missed the morning workshop.
Why it works: Because introduces the reason first, followed by a comma before the main result.
3 more examples
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Although the training session was intense, everyone passed the final assessment.
Although introduces an unexpected contrast without using but in the second clause.
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We will review the project budget when Alex arrives at the office.
When introduces a time clause that uses the present tense arrives for a future event.
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If you submit the invoice today, our accounting team will process it tomorrow.
If sets a condition in the present tense, followed by a comma and a future main clause.
Read the full guide
Identify the complete main thought
Every clear sentence needs at least one clause that can stand on its own as a complete thought. When you add a subordinating conjunction to a clause, you turn that clause into supporting information. This supporting part cannot stand alone. Before you send a message, locate the subject and verb of your main clause to confirm that the core idea is fully expressed.
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We relocated the staff meeting to room four because the air conditioning broke.
Why it works: We relocated the staff meeting to room four is the independent main clause.
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Because the air conditioning broke, we relocated the staff meeting to room four.
Why it works: Because makes the first clause dependent, requiring the main clause to complete the sentence.
Your turn
Which part of this sentence is the main clause: 'Although Sarah felt unwell, she attended the client presentation'?
Answer: she attended the client presentation
Show the answer
Answer: she attended the client presentation
She attended the client presentation can stand alone as a complete sentence with its own subject and verb.
Choose because or since to explain a cause
When you want to explain why an event took place, use because to create a direct link between the action and its reason. You can also use since when the reason is already familiar to your listener. Keep in mind that since can also refer to a starting point in time, so selecting because prevents confusion whenever the time context is unclear.
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Carlos left the office early because his daughter had a doctor appointment.
Why it works: Because directly links the departure to the specific reason.
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Since everyone has read the briefing, we can begin the discussion immediately.
Why it works: Since introduces a reason that is already known to everyone in the room.
You can practise this again in Subordinating Conjunctions: Connect Ideas Clearly and Commas in English: Separate Ideas Clearly.
Your turn
Which conjunction best provides a direct, unambiguous reason for a sudden schedule change?
Answer: because
Show the answer
Answer: because
Because clearly states the direct reason why something happened without ambiguity.
Use although to show an unexpected contrast
Use although or even though to introduce a fact that contrasts with the result in the main clause. When these two clauses express one contrast, do not add but as a second connector for that same relationship. A longer sentence can contain both although and but when they connect different parts.
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Although the software update was complex, the team finished it before noon.
Why it works: Although highlights the contrast between the difficult task and the fast completion.
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Even though the weather looked stormy, our delivery arrived on schedule.
Why it works: Even though adds stronger emphasis to the surprising result.
Your turn
Identify the sentence that correctly connects contrasting ideas without duplicate connectors.
Answer: Although the budget was small, we produced a great video.
Show the answer
Answer: Although the budget was small, we produced a great video.
Use although to introduce the contrast in this pair of clauses without adding but for the same connection. A longer sentence can contain both words when they connect different parts.
Time actions with when, before, and after
Time conjunctions organize events in a clear chronological sequence. When marks an action occurring at the same moment or immediately after another event. Before shows an earlier event, while after shows a later one. A common error among intermediate learners is inserting will into the time clause when speaking about future plans, so be sure to use simple present forms instead.
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When the client calls, please transfer the line to my desk phone.
Why it works: The present tense calls refers to a future event following when.
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Before we sign the agreement, our legal team will review each section.
Why it works: The review happens before the signing. The time clause uses the present form sign even though the signing is in the future.
Your turn
Which sentence correctly refers to a future schedule using a time conjunction?
Answer: We will send the package when the warehouse confirms the address.
Show the answer
Answer: We will send the package when the warehouse confirms the address.
Future time clauses with when use the simple present tense confirms rather than will confirm.
Set conditions with if and unless
Conditional conjunctions describe a possible situation and its probable result. Use if to establish the circumstance under which an action will take place. When you want to express a negative condition meaning except if, choose unless. Similar to time clauses, conditional clauses that look forward into the future take a present tense verb rather than a modal will.
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If the supplier ships the parts on Monday, the repairs will begin Tuesday.
Why it works: If establishes the necessary condition in the present tense.
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Unless we receive approval by noon, we cannot release the announcement.
Why it works: Unless means if we do not receive approval.
Your turn
Choose the sentence that correctly expresses a condition for an upcoming event.
Answer: If the train arrives on time, we will catch our connecting flight.
Show the answer
Answer: If the train arrives on time, we will catch our connecting flight.
The condition takes the simple present arrives, leading to the future result will catch.
Mark boundaries with until and as soon as
Certain conjunctions specify an exact stopping point or an immediate transition. Use until to indicate that an action continues continuously up to a specific event or moment. Use as soon as to show that an action happens immediately after another action finishes. Both connectors emphasize precise timing, helping listeners understand deadlines and operational workflow.
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The security team will remain on site until the final visitor leaves.
Why it works: Until marks the exact point in time when the security presence ends.
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As soon as the payment clears, we will dispatch your order.
Why it works: As soon as emphasizes that dispatch happens immediately after payment.
Your turn
Which word best completes the sentence to show continuous action up to a stopping point: 'We stayed at the desk ___ the system backup completed'?
Answer: until
Show the answer
Answer: until
Until indicates that staying at the desk continued up to the moment the backup finished.
Place commas correctly when clauses change order
Punctuation depends directly on which clause begins the sentence. When you place the dependent clause first, insert a comma right after it to signal the shift to the main clause. If you begin with the main clause and place the subordinating conjunction in the middle, you do not need a comma in standard business English.
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Because our internet connection dropped, we paused the video conference.
Why it works: A comma separates the opening dependent clause from the main clause.
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We paused the video conference because our internet connection dropped.
Why it works: No comma is needed when the main clause comes first.
Your turn
Which sentence uses standard punctuation according to clause order?
Answer: After you make changes, you should save your document.
Show the answer
Answer: After you make changes, you should save your document.
An opening dependent clause requires a comma before the main clause begins.
Avoid sentence fragments during quick editing
A subordinating conjunction turns an independent thought into a dependent fragment if you end it with a period before attaching a main clause. When reviewing your emails, check that every clause starting with words like because, although, or when connects directly to an action clause. Standalone dependent clauses confuse readers by leaving thoughts incomplete.
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We renewed the office lease because the location works well for our staff.
Why it works: Connecting the reason directly to the main clause prevents a fragment.
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Although the price increased slightly, we decided to keep the service.
Why it works: The contrast clause joins the decision clause to form one complete sentence.
Your turn
Which of these selections is a sentence fragment that needs a main clause?
Answer: Since the store opened twenty minutes late.
Show the answer
Answer: Since the store opened twenty minutes late.
Because since is a subordinating conjunction, this clause cannot stand alone as a complete sentence.
Use it naturally
How people really use “when”
Neutral Fine almost anywhere, at work or with friends.
Words it often goes with
- when you arriveI'll meet you at the gate when you arrive.
- when you're readyWe can start when you're ready.
- when you get homePlease call me when you get home.
What people also say
- “when you're ready” instead of “at the time that you are ready” This is shorter and more natural in conversation.
Questions about "Subordinating conjunctions: connect your ideas clearly"
Can I always use since instead of because to give a reason?
You can use since when the reason is already known or obvious to the listener, but because is stronger and clearer. Furthermore, since often refers to a point in time, such as since last Tuesday. If there is any risk of confusion, choose because.
Because the road is closed, we must take the highway.
Since you know the software well, could you lead the demonstration?
Do I ever need a comma before because in the middle of a sentence?
A because-clause that gives the main reason usually follows the main clause without a comma. A comma can be useful when it separates an added explanation or prevents an unintended reading, including some sentences with negatives. Choose punctuation according to the meaning and structure rather than treating negative verbs as the only exception.
We stayed inside because the storm began.
I did not call Maya, because I wanted to surprise her in person.
What is the difference between although and though?
Both words have the same meaning when introducing a contrast clause. Although sounds slightly more formal and appears frequently in business writing. Though is very common in informal speech and can also appear at the very end of a sentence.
Although the project was difficult, we finished on time.
The project was difficult. We finished on time, though.
Why can I not say 'when I will arrive'?
When introduces a time clause in the examples below, so use a present tense for the future event and will in the main clause. When can also introduce an indirect question about a future time; will is possible in that use. Check whether the clause tells you when another action happens or asks about an unknown time.
When Alex arrives tomorrow, we will start the meeting.
If it rains this evening, we will cancel the patio dinner.
Before you go
Remember this
Choose your conjunction based on the relationship between your thoughts: because for causes, although for surprises, when for schedules, and if for conditions. When the dependent clause starts the sentence, insert a comma after it. Always verify that your sentence contains at least one independent clause that can stand alone.
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Speak for 30 to 60 seconds from memory. Imagine you are teaching your cousin to ride a bike in a park. Explain why you chose this place, what you will do when your cousin feels ready, and how you will help if riding feels difficult.
Use: when because if
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I'm going to teach my cousin to ride a bike in the park because it has a wide, quiet path. First, we'll check the bike and put on our helmets. I'll hold the bike when my cousin starts moving. We'll practice stopping before we try a longer ride. I'll stay close if my cousin feels nervous. Although learning can be difficult, we can take small steps and have fun. When my cousin feels ready, I'll let go for a few seconds. After we finish, we'll get some ice cream.
Try once more and answer this: Which part of riding a bike will be hardest for your cousin?
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