You can use apostrophes to show that you have omitted (left out) some letters when you are joining words together.

For example, you can join the words ‘you’ and ‘are’ together. You + are = you’re. The apostrophe takes the place of the removed letters. In this example, the letter a.

Sometimes, however, you need to rearrange the letters a bit when you contract the words. For example: will + not = won’t.

Using contractions like these makes your writing easier to read and more friendly.

https://www.bbc.co.uk/bitesize/topics/zvwwxnb/articles/zcyv4qt

I am attaching a skills sheet and a matching game.

Punctuation—Apostrophes-for-omission

Contaction Match Game – year 2, 3, 4, 5, 6, punctuation, spellings

Below are a number of games which you can play all about apostrophes for omission / contraction.