Into

 Into

####To the inside or inner part of a container, place, area etc

e.g. Come into the office.

e.g. He thrust his hand into his coat pocket.

####Used to say that someone becomes involved in a situation or activity, or becomes part of a group

e.g. At the age of 16, I went into the printing trade as an apprentice.

e.g. They tried to drag me into their quarrel.

####Used to say that someone or something starts being in a different state or form

e.g. She fell into a deep sleep.

e.g. The whole banking system was thrown into confusion.

e.g. I screwed my wet handkerchief into a ball.

e.g. Cut the cake into pieces.

e.g. Neruda’s poems have been translated into English.

####Used to say that a person or vehicle hits someone or something after moving towards them

e.g. He almost bumped into me as he rushed past.

e.g. The car swerved and crashed into the wall.

####Used to say what someone is trying to find out information about

e.g. An investigation into the events leading up to his death..

e.g. I’ve been doing some research into this.

NOTE- As per the Cambridge dictionary, with some verbs (e.g. put, fall, jump, dive) we can use either in or into with no difference in meaning

e.g. Can you put the milk in/into the fridge?

e.g. Her keys fell in/into the canal.

Sources:

Cambridge dictionary

Longman dictionary

Oxford dictionary