Can you walk? Yes, I 
can.

Can you dance? No, I 
can't.

Can your daughter read? 
Yes, she can.

Could you help me? 
Unfortunately, I couldn't.

Could you tell me the 
time? Yes, I could.

Must the children go to 
bed? Yes, they must.

Must I clean my room, 
mum? No, you don't 
have to.

May I watch this film? 
No, you mustn't.

Should I talk to her? 
Yes, you should.

Should he go there 
alone? No, he shouldn't.

Could Sally dance eight 
years ago? No, she 
couldn’t.

Should she have told 
him the truth? Yes, she 
should.