3 Peter can pay for us. (question)
Can Peter pay for us
4 We must go to the passport office today. (negative)
We mustn' t go..
5 We can go to the bank tomorrow. (negative question)
Couldn 't we go..
6 You should phone the school today. (negative)
you shouldn 't phone
7 You can answer all the questions. (question)
can you answer
8 She can pay for the lessons. (negative)
she can't pay
9 You can talk to Mary for me. (question)
Can you talk
10 Peter can check the times of the trains for us. (question)
Can Peter check
11 We must say goodbye to Alan and Sue. (question)
must we say
12 They can stay here for a week. (negative)
they can ' t
13 We can buy a return ticket here. (question)
can we buy
14 They should help you. (negative)
they shouldn 't
15 He can understand me. (negative question)
Couldn t he understand me