虚拟语气
Ⅰ.在英语中,随着说话人意图的不同,动词需要不同的形式,称为语气。英语动词一般有三种语气,即:
陈述语气:用来陈述一个事实或提出一种看法。有肯定,否定,疑问或感叹等形式。
Some peple don’t like music.
What a fine day today!
祈使语气:用来请求,命令或劝告等。Don’t be late again.
虚拟语气:表示说话人所说的话不是事实,而是一种假想,愿望,建议等,虚拟语气主要用于条件从句,让步从句或名词性从句中,虚拟语气通过谓语动词的特殊形式(过去式)表示。
II.虚拟语气的用法
if 主从句的虚拟
虚拟句 与何时相反 If 条件句 主句
与过去相反 had done should/would/could/might+have done
与现在相反 did should/would/could/might+do
与将来相反 ①.did ②.were to do ③.should do should/would/could/might+do
注意事项:
1).if 从句可以用连词or /otherwise 或 without/but for引导的介词短语来替代。
Without your help,we couldn’t have done the work well.
2).if 从句中的if 可省略,而将动词had/should/were提前。
Had you taken his advice ,you would not have met so many problems.
3).有时候,if 从句的动作与主句的动作发生的时间不一致(如一个是发生在过去,另一个是发生在现在)这时,动词的形式要根据表示的时间来调整。
If it had not rained yesterday ,the ground would not be muddy now.
wish ,would rather ,as if 从句虚拟
虚拟句 与何时相反 wish从句 would rather从句 as if从句
与过去相反 had done had done had done
与现在相反 did did did
与将来相反 ①. did ②would/could/might+do did would/could/might+do
3.should do 虚拟(should 可以省略)
A.与“一坚持(insist),二命令(order,command),三建议(suggest,propose,advise,recommend)四要求(demand,require,request,desire)”有关的名词性从句。
例1.I suggest that you should go to hospital now.
2.It is suggested that you should go to hospital now.
3.The suggestion is that you should go to hospital now.
4.The suggestion that you should go to hospital now is good.
B.It is +adj. +that sb.should do.
(这类adj.是:important,strange,necessary,natrual 等)
It is strange that you should come on Sunday.
⑦.The young man insisted that he ____nothing wrong and ___free.
A.did;set B.had done ;should be set C.do ;be set D.had done ;must be set
4.It is (high)time that sb.did sth.(到某人干某事的时候了)
It is time that you went to school now.
⑧.It’s time that you ____home and I’d rather you ____again tomrrow.
A.went;came B.are going ;will come C.go ;are going D.would go ;would come