-’s
short form(informal)- used after he, she or it and where, what, who or how to mean ‘is’ or ‘has’
- She's still in the bath.
- What's he doing now?
- It's time to go now.
- Who's taken my pen?
- Where's he gone?
- It's gone wrong again.
- (used after let when making a suggestion that includes yourself and others) us
- Let's go out for lunch.