if引导条件状语从句时,在条件状语从句中要用一般时表示将来时,而主句可以是三种情况.
1.主句可以是一般将来时.如：If he comes, I will let him go into your office.
2.主句也可以是情态动词+动词原形.如：If he comes, you can tell him this.
3.主句也可以是祈使句.如：If he comes, let him go into my office.
宾语从句时态练习题
1. Catherine said that she ___ to Guangzhou.
A. has never gone
B. had never gone
C. has never been
D. had never been
2. The students want to know whether they___ discussion(讨论) today.
A. had
B. has
C. will have
D. are
3. She asked Linda if___ go and get some books.
A. could she
B. she could
C. she can
D. she may
4. Can you tell me___ you were born, Betty?
A. who
B. what
C. when
D. that
5. I don't know ___ they have passed the exam.
A. what
B. if
C. when
D. where
6. She didn't know___ back soon.
A. whether he would be
B. if would he be
C. he will be
7. She asked me if I knew ______.
A. whose pen is it
B. whose pen it was
C. whose pen it is
D. whose pen was it
8. Did you know ____?
A. who he was looking after
B. who was he looking for
C. who he is looking for
D. who he is looking after
9. Could you tell me ___?
A. when will they leave Beijing
B. when would they leave Beijing
C. when they will leave Beijing
D. when did they leave Beijing
10. Could you tell me if it _____ tomorrow?
A. rains
B. is raining
C. will rain
D. rain
11. The teacher told his students the sun_____ in the east.
A. rise
B. rises
C. rose
D. risen
12. Could you tell me ______?
A. where is the nearest railway station
B. where the nearest railway station was
C. where the nearest railway station is
D. where was the nearest railway station
13. Can you tell me _________ ?
A. where does Tom live
B. where Tom lived
C. Tom lives where
D. where Tom lives
14. Let me tell you ______.
A. how much is the car
B. how much does the car cost
C. how much did I pay for the car
D. how much I spent on the car