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问一个英语句子,有关were

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问一个英语句子,有关were
The acrobat had to acknowledge he could very well die were he to perform it.
very well die这个我明白,但后面这个were是怎么用的?这样用对吗?
问一个英语句子,有关were
这句话里包含了虚拟条件句,如果不倒装就是:The acrobat had to acknowledge he could very well die if he were to perform it.
虚拟条件句的从句部分含有were,should,或had时,可省略if,再把were,should或had 移到从句的句首,实行倒装.例如:
Were they here now,they could help us.=If they were here now,they could help us.他们现在在的话,就会帮助我们了.
Had you come earlier,you would have met him.=If you had come earlier,you would have met him.你来得早一点,就碰到他了.
Should it rain,the crops would be saved.=Were it to rain,the crops would be saved.假如下雨,庄稼就有救了.
注意:在虚拟语气的从句中,动词'be'的过去时态一律用"were",不用was,即在从句中be用were代替.例如:
If I were you,I would go to look for him.如果我是你,就会去找他.
If he were here,everything would be all right.如果他在这儿,一切都会好的.