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In, into, or inside
In means being within with no movement, into means moving to the inside, and inside stresses the interior against the outside.
Quick rule
Within and still? In. Moving to the inside? Into. Stressing inside against outside? Inside.
Within a place, area, or group, with no movement: in the box, in the class. Also used with languages and times of day.
Toward the inside: movement from outside to inside, as in walk into the room. Also a change into something else.
The interior, not the outside: inside the house. With no place after it, it means indoors: come inside.
How to choose
| Question | in | into | inside |
|---|---|---|---|
| Before a place, does it mark going from outside to inside? | SometimesSometimes | Yes | No |
| Can it stand alone at the end, with no place (come ___)? | Yes | No | Yes |
| Does it stress that something is inside and not outside? | SometimesSometimes | No | Yes |
Why it trips people up
These three words share one idea, the inside. In says where something is, into says it is moving toward the inside, and inside stresses the interior against the outside. Because the idea is so close, people often use in where movement needs into.
How each one works
In
Being within something
The keys are in the top drawer.
Asking if something is in there
Is there any milk in the fridge?
In with a language
Please write your name in English.
Into
Entering a place
He walked into the kitchen and sat down.
Moving something inside
Pour the milk into the glass.
Hitting something
The truck crashed into a fence on the highway.
Inside
What is in the interior
Look inside the box. There's a surprise.
The interior against the outside
Inside the house, everything was quiet.
Indoors, with no place after it
It's freezing, so the kids are playing inside.
What comes next
in plus language, group, or part of the day
She is the best singer in the choir.
move plus something plus into plus place
She put the letter into the envelope.
get into plus car or building
Get into the car, we're late.
inside plus place
Leave your shoes inside the door.
inside, with no place: indoors
Come inside. Dinner is ready.
Set phrases
In
- in the morning
- during the first part of the day
- in a hurry
- needing to do something quickly
Into
- break into
- to enter a place by force to steal
- be into
- to like something a lot
Inside
- inside job
- a crime done by someone who works there
- inside pocket
- a small pocket on the inner side of a jacket
Almost the same
The dog is in the house.
It is there, not moving.
The dog ran into the house.
It came from outside.
The dog is inside the house.
It stresses it is not outside.
He is in trouble.
He is already in that situation.
He got into trouble.
He entered that situation.
In a conversation
- A:
Where's Max? I can't see him in the yard.
- B:
He's inside. He ran into the kitchen when it started to rain.
- A:
Good. Is his bowl in the kitchen too?
- B:
Yes, I put it next to the fridge.
- A:
Then let's go inside too. I'm freezing.
- B:
Come in! I'll make some hot chocolate.
Common mistakes
Wrong: We walked in to the museum at ten.
Right: We walked into the museum at ten.
Moving to the inside of a place is one word, into. In to in two words is for cases like come in to see me.
Wrong: The cat is sleeping into the basket.
Right: The cat is sleeping in the basket.
Into needs movement. A cat that is already asleep is still, so use in.
Memory trick
Into is in + to: something goes toward the inside or changes into something else. If it is already there and still, in. If the opposite is outside, inside.
It depends
- Put it in the box
- With put, in is heard even when something moves: Put it in the box. Into works too.
- Get in trouble
- In the US you hear both get in trouble and get into trouble. People understand either one.
- Inside of
- Inside of is also heard in the US: inside of the box. Inside the box is shorter and means the same.
FAQ
What is the difference between in and into?
In tells where something is: in the room. Into tells where it moves: into the room.
Is it inside or inside of?
Both are heard in the US. Inside the house is shorter, and inside of the house means the same.
Do you say walk in or walk into?
With a place after the verb, walk into the room. Without a place, walk in.