2. Mary　said　she　would　write　to　me.

1. I　will　wait　for　you　until　you　come.

4. If　I　have　a　good　sleep,.　I　will　be　able　to　do　the　problem.

3. When　I　was　young,　I　was　able　to　swim　across　the　river.

2. Can　you　go　with　me?

1. No　one　can　answer　the　question.

3. Student　may　not　bring　books　to　examination　room.

2. You　can’t　eat　you　cakes　here.

1. You　shouldn’t　shout　in　the　library.

3. You　must　be　here　by　the　ten　o’clock.