Confusing into and in to is a very common mistake.

1. Into is a preposition that describes movement towards or inside something.

  • The train disappeared into the tunnel.
  • I think he went into that shop.
  • Plug the mouse into the computer.

2. In to is an adverb (in) followed by a preposition (to). They often sit together due to correct sentence construction.

  • I will hand this bag full of money in to the police.
  • The courier came in to deliver a parcel.

Note: These sentences work without the adverb in. The adverb makes the sentences more expressive and definite.

  • I will hand this bag full of money to the police.
  • The courier came to deliver a parcel.

You can download these lessons as fully navigable PDFs 

Practical English Usage Lesson 21 into and in to



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