文档介绍：会计学
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专升本考试辅导语法
一、用过去完成时的几个典型情况：
by+过去时间： by then, up to then, till then,
By1988, scientists surely had discovered cure for the common cold.
It was the first/second/last time+从句
This was the second time he had been out with her alone.
注：it is the first /second/last time that …用现在完成时。
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固定结构：
hardly/scarcely /barely …when…;
no sooner…than…
表示“刚刚就…，不等就…”。
had hardly (scarcely, barely) gone to bed when the bell rang.
sooner had they left the building than a bomb exploded.
注：主句用过去完成时，从句用一般过去时。
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二、用将来完成时的典型情况：

by + 将来时间
We will have made our country one of the medium developed countries in the world by the year of 2050.
By next Monday, she will have studied here for three years.
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时态练****br/>David___ the golf club for 2 years.
A. has joined B. has been
C. joined D. has been in
Yesterday when we left, they___ a meeting.
A. were having B. have
C. are having D. had
If it___ next Sunday, we won’t go to the park.
A. rains B. rain
C. raining D. will rain
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We _________ in touch with each other since 2003.
A. have kept B. had kept
C. kept D. keep
Even if it ______ this afternoon, I will go there.
A. has rained B. will rain
C. rains D. will have rained
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When we arrived at the airport, we were told our flight _______.
A. had been cancelled B. had cancelled
C. has been cancelled D. cancelled
3. His grandfather___ for quite some years.
A. had died B. has been died
C. has been dead D. is death
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It’s been 5 years since he_________ China.
A. left B. had left C. has left D. leaving
By the time you get back, great changes _______ in this area.
A. will take place