マイクロリスニング
In vs into: choose the right preposition
Can I say 'put something in' instead of 'put something into'?
In marks location, enclosure, or a stable state where no boundary is being crossed. Into marks directional movement from an outside area toward an inside space, or an abstract transformation from one condition to another.
ポイント
- Use in when an object is already positioned inside an area.
- Use into when an action moves an object across a boundary or changes something into a different form.
- Check whether movement stays within one room or enters from outside.
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理解
意味、使う場面、避けたい間違いを学びます。
例
The spare blankets are in the hallway closet.
この表現を使う理由： The blankets already rest inside the closet, so in indicates their fixed location.
ほかの例を2件見る
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Rachel carried the groceries into the kitchen.
The groceries travel from outside the kitchen across the doorway to the inside.
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Heat turned the solid butter into golden liquid.
Into marks a complete transformation from solid butter to liquid.
基本から解説を読む
Check whether an object crosses a boundary
When you describe where something sits, stays, or rests, use in. When an action carries a person or object across an edge or boundary into an enclosed space, use into. The starting question is always whether the subject was already inside before the action started.
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The extra notebooks are in the storage cabinet.
この表現を使う理由： The notebooks already rest inside the cabinet, so in marks their stationary position.
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Marcus slipped the envelope into his coat pocket.
この表現を使う理由： The envelope travels from outside the pocket to the inside space.
自分で試す
Choose the correct word: The mechanic left the wrench ___ the toolbox after cleaning it.
答え： in
答えを見る
答え： in
The wrench is resting inside the toolbox after the cleaning is finished. Because this describes a location rather than movement across a border, in is correct.
Match direction verbs with into
Action verbs like step, slide, pour, push, and throw usually take into when they send something inside an enclosure. Learners often default to in because casual speech accepts it, but into clearly signals entry and direction in clear spoken English and formal writing.
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Elena poured cold water into an open glass pitcher.
この表現を使う理由： The liquid moves from the bottle into the glass container.
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The courier carried three packages into our lobby.
この表現を使う理由： Into shows movement from outside to inside; the sentence does not identify the original location.
Resign from or on: Choose the Right Prepositionとacross vs through: choose the right pathでこれをもう一度練習できます。
自分で試す
Which sentence clearly emphasizes entering a new space?
答え： David carried his laptop into the small break room.
答えを見る
答え： David carried his laptop into the small break room.
The verb carried paired with into shows active motion crossing the doorway from outside the room to inside.
Separate internal motion from entering
Movement does not always require into. If an action happens entirely inside one room, park, or building, choose in. A runner jogging laps inside a sports hall is running in the hall. They only run into the hall when they enter it from the street outside.
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The children were jumping in their bedroom.
この表現を使う理由： The activity remains completely inside the bedroom walls.
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The children ran into their bedroom when the bell rang.
この表現を使う理由： The children crossed the doorway from the hallway into the room.
自分で試す
Choose the sentence where movement stays entirely inside an enclosed area.
答え： The manager walked back and forth in the conference room.
答えを見る
答え： The manager walked back and forth in the conference room.
Walking back and forth describes movement contained within the room, so in is the proper preposition.
Use into for changes in state or form
English uses into when a person, process, or material changes from one condition to another. Verbs like turn, transform, convert, and translate take into because the subject crosses an abstract boundary to arrive at a fresh outcome or identity. Always look for this shift in condition before choosing your preposition.
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The architect turned an old brick warehouse into modern offices.
この表現を使う理由： The building changes its entire structural purpose and appearance.
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Our team translated the customer survey into Spanish.
この表現を使う理由： The text shifts from its original form into a new language version.
自分で試す
Complete the sentence: Freezing temperatures transformed the standing rain ___ ice.
答え： into
答えを見る
答え： into
Transform takes into to mark the change from liquid water to solid ice.
Choose prepositions for personal vehicles
Learn vehicle phrases as common combinations. People get into cars and taxis, and get on buses, trains, and planes. Usage with boats depends on the type of boat and the situation. Size and entry position can help you remember some examples, but they do not form a reliable rule for every vehicle.
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Teresa got into the taxi outside the central station.
この表現を使う理由： A taxi is an enclosed private automobile requiring entry into a low seat.
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We stepped into the rideshare vehicle before the rain intensified.
この表現を使う理由： The motion moves the passengers from the open sidewalk into the car interior.
自分で試す
Which phrase correctly shows entering a personal automobile?
答え： get into a taxi
答えを見る
答え： get into a taxi
Enclosed private cars take get into when you enter their cabin.
Separate the preposition into from in to
Do not confuse the single word into with two separate words written as in to. In phrasal verbs like log in, drop in, turn in, or hand in, the word in belongs to the verb. The word to is an infinitive marker or preposition introducing an action or destination.
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Please log in to your account using two-factor authentication.
この表現を使う理由： Log in is the phrasal verb, and to introduces the destination platform.
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He dropped in to see how our new project was progressing.
この表現を使う理由： Drop in functions as a unit meaning visit, followed by the infinitive to see.
自分で試す
Choose the correct spelling: Sandra went online to log ___ her bank profile.
答え： in to
答えを見る
答え： in to
Log in is a phrasal verb. The particle in attaches to log, while to connects to the destination profile.
Hear the rhythm of into in natural speech
In connected speech, speakers rarely pronounce into with two heavy, separated beats. The first syllable carries the primary stress, while the final vowel often shortens before consonants. Listeners must catch the quick /ɪn/ onset rather than waiting for an exaggerated second syllable. Notice how smoothly it connects to following nouns.
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Pack your lunch into a cooler.
この表現を使う理由： Stress hits the first syllable of into, linking smoothly to the following vowel sound.
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Walk into an office.
この表現を使う理由： The final vowel of into connects directly to the vowel an without a pause.
自分で試す
Where does stress fall when a speaker pronounces the preposition into?
答え： On the first syllable
答えを見る
答え： On the first syllable
The preposition into places its primary acoustic stress on the first syllable /ɪn/.
Avoid redundant prepositions with enter
A frequent error in formal essays and emails is writing enter into a room. The verb enter already contains the meaning of going inside. In physical contexts, write enter the room or walk into the room. Save enter into for legal agreements or formal negotiations.
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The inspector entered the building at nine in the morning.
この表現を使う理由： Enter directly takes the direct object without a preposition for physical structures.
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The two companies entered into a partnership last winter.
この表現を使う理由： Enter into is an established legal idiom meaning to begin an agreement or contract.
自分で試す
Select the sentence with natural physical movement that avoids redundancy.
答え： The technician walked into the server room.
答えを見る
答え： The technician walked into the server room.
Walk into pairs the physical action verb with into. Saying entered into for a physical room is redundant.
自然な使い方
「into」の実際の使われ方
ニュートラル 職場でも友人との間でも、ほとんどの場面で使えます。
よく一緒に使われる言葉
- carry intoWhich chairs should we carry into the classroom?
- pour intoHow much milk should I pour into the bowl?
- turn intoWater can turn into ice when it gets cold enough.
- step intoPlease step into the elevator carefully.
「In vs into: choose the right preposition」に関する質問
Can I say 'put something in' instead of 'put something into'?
Yes. 'put the milk in the fridge.' is natural English. Into emphasizes movement from outside to inside, while in can name the destination after a verb such as put. Choose according to the verb and meaning; formal writing does not always require into.
He put the keys into his pocket before locking the door.
She put the milk in the refrigerator.
Why do teachers say 'enter into' is wrong for buildings?
The verb enter already means 'to go into' a space. Saying 'enter into the room' repeats the idea of entry redundantly. Use 'enter the room' or 'walk into the room.' Reserve 'enter into' for figurative meanings, such as entering into a contract, an agreement, or a debate.
The committee entered the auditorium together.
Both companies agreed to enter into a formal contract.
How do I know whether to write 'in to' as one word or two words?
Look at whether the word in is attached to a preceding phrasal verb. In phrases like 'log in,' 'drop in,' or 'turn in,' in forms an inseparable part of that verb. The word to that follows introduces an action or recipient. If the word indicates directional movement inside a physical boundary, write the single preposition into.
Remember to log in to the employee dashboard.
The cat slipped quietly into the bedroom.
Why do we get into a car but get on a train?
Learn the usual combinations: get into a car or taxi, and get on a bus, train, or plane. Boat expressions vary with the vessel and context. English uses on for a bicycle too, so cabin size or an aisle cannot explain every choice.
Get into the taxi before the traffic light changes.
We got on the express train just before departure.
最後に確認
これを覚えましょう
Use in when an object is already positioned inside an area. Use into when an action moves an object across a boundary or changes something into a different form. Check whether movement stays within one room or enters from outside.
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