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• 1.If从句表达的意思和现在情况相反或目前不可能实现
• If+were/did , S +would/could/should+v.
如:
If I had time, I would go now.
If I were a bird, I would fly.
注意:would 可换成:might could should
• 2.If从句表达的意思与过去事实相反
• If+had done , S+would have done
从现在的角度对已经发生的事情发出感叹、表达后悔。
如果当初怎么样,那么现在就怎么样了。
如:
If you had come here earlier, we would have
finished the work now.
没有早来,没有完成。
• 3.If从句表达的意思与将来事实很可能相反或将来实现的
可能性很小
• If +were to do/did/should , S +would do
如:
1. If I should win a lottery of 10 million dollars,
I would buy you a big house.
2. If I should have time tomorrow,
I would go with you.
• 虚拟倒装句
• 在if条件句中含有should,had,were时,常常会把if省
去,并将should,had,were放在句首 (其余部分顺序
不变)。
如:
If I were you, I would go.等同于
Were I you, I would go.
The bus would not have had to take(A) the long
detour instead of (B)the main highway if the
bridge did not e (C)treacherous in the aftermath
of (D)an ice storm. No error(E)
08年01月
• Had (A) I known that we would be (B) walking the
fifteen (C) blocks from the movie theater to the
restaurant, I would of (D) worn more comfortable
shoes. No error (E)
08年01月
• Were they to be told the purpose of the study, the
participants might find it difficult to answer the
questions spontaneously.
• (A) Were they to be told
• (B) If they would have been told
• (C) With it being told them
• (D) ling them
• (E) By ling them
12年05月
• If there had been a power failure, the hospital will
run on electricity from its own generators, which
can operate for 200 hours
• (A) If there had been
• (B) If there were
• (C) Had there been
• (D) Should there be
• (E) There has been
08年10月
• require, request, suggest, command
+that …(should)…
• I request tha
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