No wonder he (to be) very tired.he (to work) hard for the last three months. 2.my mother(to come) to stay with us next weekend. 3.you often (to get)-letters from her? not very often. 4.if we (not to get) to the station before seven we (to miss) the train. 5.mary (to be) in the kitchen now.she (to put) the supper on a tray to take it to the dining room 6.you (to hear )anything? yes,i (to hear) soft musik. 7.i(not to see) him since we finished school. 8.everybody (to be) here? no,mr.black (not to came) yet. 9.i(to live) in london many years ago.

No wonder he was very tired.He had been working hard for the last three months.2.My mother will  come to stay with us next weekend.
3.Do you often get letters from her?
Not very often.
4.If we don't get to the station before seven we'll miss the train.
5.Mary is  in the kitchen now.She is putting the supper on a tray to take it to the dining room
6.Did you hear anything?Yes,I  heared soft musik.
7.I haven't seen him since we finished school.
8.Is everybody here? No,Mr.Black hasn't come yet.
9.I lived in London many years ago.