1．He ________ (wait) for an hour.
2．I ________ (not finish) the work yet.
3．________ you ________ (know) him since then ?
4．I ________ (hear) from my father recently.
5．We ________ (be) there many times in the past 3 years.
6．The sun ________ (rise) when we got there.
7．They ________ (finish)the work by the end of last month.
8．How long you ________ (stay) at home already
9．I ________ (not read) the book before.
10．He ________ just ________ (do) it.
11．My sister ________ (walk) to school everyday last year.
12．We ________ (have) an exam. again sometime next week.
13．By 1993, we ________ (plant) 20,000 trees.
14．Her sister ________ (go) to Shanghai. She ________ (leave) this morning.
15．My friend Wang Hai often ________ (swim) in the river.
16．The writer ________ (finish) several story-books since 1980.
17．I asked my mother ________ she ________ (come) back soon.
18．What ________ you ________ (do)when I called you ?
19．Don't cry! Our teacher ________ (go) over his lessons.
20．He just ________ (have) his breakfast.
21．I believe that our volleyball team ________ (be)back in a week.
22．The famous scientist ________ (reach) Beijing two days ago.
23．We'll go to visit the museum if it ________ (not rain) tomorrow.
24．I saw my friend when I ________ (walk) in the street.
25．Look, the boys ________ (play) on the play ground.
26．He ________ (live) in his hometown since he left here.
27．He ________ (go) to see his grandfather last Sunday.
28．When we got to the classroom, the class ________ (begin).
1．Is Tom's bike new?（肯定回答）
2．There are come English books in the desk.（一般疑问句）
3．He has tea at half past two in the afternoon.（否定句）
4．It will take the workers more than a month to repair the bridge.
5．I did my homework by myself yesterday.（一般疑问句）
6．He had done with the goods before he went away.（否定句）
7．The teacher was talking with Tom's mother.（对划线部分提问）
8．I'm allowed to watch TV at home only once a week. （对划线部分提问）