Ответ:

1) Jack may come to our wedding, but we aren't sure.

2) Shall I buy the tickets for the concert? I can see you're too busy.

3) We ought to pay the fees at the fixed time.

4) You should clean your room more often.

5) If it rains Saturday, we won't be able to go to the beach.

6) Can you speak German? No, I can't.

7) Jane couldn't play violin when she was five, but now she can play it very well.

8) You shouldn't be so nervous. I think it will be very easy.

Объяснение:

Надеюсь помогла.)