-'s

-'s¹ [z, s]

1.) the short form of 'is'

▪ John's here.

▪ What's that?

▪ She's writing a letter.

2.) the short form of 'has'

▪ Polly's gone out.

▪ A spider's got eight legs.

3.) a short form of 'us' used only in 'let's'

4.) spoken a short form of 'does', used in questions after 'who',`what' etc that many people think is incorrect

▪ How's he plan to do that?

-'s ²

-'s² suffix

1.) forms the ↑possessive case of singular nouns, and of plural nouns that do not end in -s

▪ my sister's husband

▪ Mary's generosity

▪ yesterday's lesson

▪ the children's bedroom

2.) BrE the shop or home of someone

▪ I bought it at the baker's (=at the baker's shop) .

▪ I met him at Mary's (=at Mary's house) .