高考英語單元知識點復習Unit 8
例：i could have come on time,but my car broke down on the way.
我本來能夠按時來的，但車在路上壞了。
you could have been more careful.
你本來可以更細心的。
you should/ought to have told me about it earlier.
你本應該早點告訴我的。
i should have finished the work earlier.
我應當早一點完成這項工作的。
you may (might) have read about it.
你可能在報上已經讀到這件事了。
he needn’t have worried about it.
他本不必為此事擔心。
there was a lot of fun at yesterday’s party.you ought to have come,but why didn’t you.
昨天的聚會非常有意思。你本應該來，為何不來呢？
鏈接•提示
比較：must have done sth.過去一定做過某事；can’t have done過去一定沒有做過某事
he isn’t here.he must have missed the train.
他還未到，一定是沒趕上火車。
where can (could) he have gone?
他能到哪里去了呢？
練：miss yang_______at 5:00 for the meeting,but she didn’t appear.
a.should have arrived b.should arrive
c.should have had arrived d.should be arriving
提示:本題考查情態動詞的用法。從句子的意思分析，此處應該表示“本應該在5:00來開會”，但事實是沒有到。所以使用should have done結構。
答案:a
辨析
1.catch fire，be on fire,make a fire,set fire to,put out the fire
catch fire表示動作，“著火”。
(be)on fire表示狀態，“著火”。
make a fire生火
start/light a fire點火
put out the fire撲滅大火
set...on fire/set fire to縱火，放火燒
即時練習:
(1)if a pan of oil ___________,turn off the gas and cover the pan quickly.
(2)the company ___________last night and it is still on fire.
(3)the fire has been ___________for half an hour.
(4)they _____________to keep warm.
(5)the old woman was about to _____________to cook dinner when someone knocked at the door.
(6)they ___________to be seen by the rescuing team.
(7)the fire had been ___________before the firemen arrived.
(8)the japanese to his house.
答案:(1)catches fire (2)caught fire (3)on fire (4)made a fire (5)make a fire (6)started a fire (7)put out (8)set fire
2.in case of,in case,in any case,in no case,in that case
in case of +n.萬一；在……情形下
in case后跟從句或用作副詞位于句尾，意為“在……情況下；萬一……的話”。
in any case在任何情況下
in no case無論如何
in that case那樣的話；在那種情況下
即時練習:
(1)____________an earthquake,don’t panic.
(2) ___________ should you give up.