Can, can't, could and couldn't

___ I go to the bathroom?

• Can

• Need

• Can't

I'm sorry, I ____ swim.

• can

• can't

I ___ help you!

• Can

• can't

• need

It's cloudly. I ___ go outside.

• can't

• can

I _______ sleep yesternday.

• couldn't

• could

We _____ finish the marathon.

• could

• couldn't

I was tired. I _______ finish my homework last night.

• couldn't

• could

We _____celebrate my birthday last monday.

• could

• couldn't

___ you help me?

• Can

• Can't

• has

You were very stressed. You ______ finish the activity.

• couldn't

• could