Modal verbs

She ... swim when she was just three.

• would

• can

• could

You offer to introduce me to your family. You ask... (May)

... to my family?

You want me to help you with your homework. You ask... (Can/May)

... with my homework, please?

You want to open the window. You ask... (Could)

... the window?

(Airport notice) Liquids ... be in 100ml containers and in a closed plastic bag.

• must

• has to

In the UK you can leave a tip in the pub if you want, but you ...

• mustn't

• couldn't

• don't have to

Have you got your passport? I'm not sure if you'll need it but they ... ask you for ID.

• must

• might

• can't

• - Who left their laptop on my desk?

• - It ... be Mel's – she's working at home today.

• can't

• must

• could

Your watch says a different time from mine. One of them ... be wrong.

• could

• may

• must

Look at that bird! Maybe it's an eagle or it ... be a vulture.

• must

• could

• can't