In, into

We useinto talk about where something is in relation to a larger area around it:

A:

Where’s Jane?

B:

She’sinthe garden.

I’ve left my keysinthe car.

We useintoto talk about the movement of something, usually with a verb that expresses movement (e.g.go,come). It shows where something is or was going:

A:

Where’s Jane?

B:

She’s goneintothe house.

Helen cameintothe room.

With some verbs (e.g.put,fall,jump,dive) we can use eitherinorintowith no difference in meaning:

Can you put the milkin/intothe fridge?

Her keys fellin/intothe canal.

We usebe intoto express enthusiasm or strong interest for something:

He’sreallyintohis work.

I’m intoclassical music and Thai food.

We useintoafter verbs describing change:

We’vetranslatedthe courseintosix different languages.

Shechanged intoher swimming costume and went for a swim.

Theydividedthe cakeintofour pieces.

Not:They divided the cake in four pieces.

We useinto make a number of phrasal verbs:

I was feeling very tired and I couldn’t reallytake inwhat she was saying.(understand)

Pleasecall inand see us next time you’re in the area.(visit us briefly)

A good learner’s dictionary will include the most common phrasal verbs within.