四级语法虚拟语气思维导图
概括四级语法虚拟语气重点知识点
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思维导图大纲
四级语法虚拟语气思维导图模板大纲
1、与现在事实相反得主观假设
条件从句
一般现在时改为一般过去时
主句
should/would/could/might +动注: be 动词一律改为were
2、与过去事实相反得主观假设
条件从句
一般过去时改为过去完成时
主句
should/would/could/migh/thave+过去分词
3、与将来事实相反得主观假设
条件从句
一般过去时
注: be 动词一律改为were词原形
should+动词原形
were + to do sth
主句
should/would/could/might +动
混合条件句
主句与条件从句所发生得时间点不一致,这个时候就需要根据各自得时态进行倒退来做相应修改
例句:If you had finished your homework by yourself yesterday (过去)
you would not copy other's answers in a hurry (现在)
虚拟语气得倒装
如果从句中有were, should, had, 则需要倒装
倒装方法:将if省略，再把were, should, had挪到从句得句首，如果从句中没有were, should, had, 则不能省略if,也不可倒装
原句: If you should make great progress in the near future, you should be grateful to your teachers
倒装: Should you make great progress in the near future, you shouldbe grateful to your teachers
4、虚拟语气词: should
(1)It is suggested/requested/ordered, etc、(具有命令,建议，要求等口吻得动词过去分词) + that sb should (should可省略) do (动词原形) sth
原句:It is suggested that students (should) use dictionary in exam
宾语从句:I suggest that students (should) use dictionary in exam
表语从句:My suggestion is that students (should) use dictionary in exam
同位语从句:I provided a suggestion that students (should) use dictionary in exam
(2) It isnecessary/important/indispensable, etc、( 带有主观色彩得形容词) + that sb (should) do sth
(3)It is a pity/a shame, etc、( 名词性词组)+ that sb (should)do sth
5、虚拟语气特殊句型
It is high (high 可省略) time that ...该就....得时候了“that ...”从句动词可以用
(1)过去时
例句:It is (high) time that we should draw up a contract
(2)should (不能省略) +动词原形
例句:It is (high) time that we drew up a contract
6、含蓄虚拟语气
1、 Without “要就是没有....”
例句: Without the rescue of firefighters timely, our lives would not have been saved、
2、But for“要不就....”
例句: But for your professional help, I could not have achieved sucha big progress in medical community
3、Under... “在某种情况下.....”
例句: Under such circumstances, the criminal would not haveperpetrated acts of violence upon children
4、With.. “....得前提下”
例句: With the data collected one month earlier, we could finish the project more efficiently
5、In the absence of....“ 如果没有.....”
例句: In the absence of law, women would continue to lack the irrights to vote on their own
6、Otherwise “否则 ”
例句: We didn't know his educational background and achievementin this field, otherwise we would have fired him
7、 Ifit were not for ... “要不就是..... (用于现在得情况)”
例句: If it were not for the brilliant guidance of the Communist Party of China, we could not lead a happy life
8. If it had not been for ... "要不就是......（用于过去/已经发生的情况）
例句： If it had not been for my illness, I would have attended thisimportant meeting last Monday
倒装：Had it not been for my illness, I would have attended thisimportant meeting last Monday
9. as if/as though... “好像...似的”
Time can take away our happiness and sadness as if/though it was endowed with magic power（与现实事实相反得用虚拟语气）
The student studied industriously as if/though he had never felttired and exhausted（与过去事实相反得用虚拟语气）
The boy still stays calm as if/though he has known the beginningand the end of the matter already（就是事实的，按实际的时态就可以）
例句:If there were an English dictionary, we could consult it for this difficult word思维导图模板大纲
例句:If my favorite teacher had been here yesterday, I would have paid more attention to the lesson思维导图模板大纲
例句：If you were to make great progress in the near future, you should not forget your teachers思维导图模板大纲
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