动词不定式表示虚拟条件
It would be only partly right to follow in this way. 如果用这种方式,仅仅对了一半。
现在分词表示虚拟条件
Having known in time ,we might have prevented the accident.要是及时得知的话,我们也许能阻止这场事故。
过去分词表示虚拟条件
Given more attention, the tree could have grown better. 如果多留心的话,这树本来可以长的更好。
副词otherwise表示虚拟条件
I was too busy at that time.Otherwise,I would have called you.我当时太忙,否则我就给你打电话了。
连词but连接的句子表示虚拟条件
He _____fatter but he eats too little .
A. would become
B. would have become
C. must become
D. must have become
其它
状语从句 as if/as though引导的状语从句中动词用did或had+done或would/could/might+do。
注意:as if/as though引导的状语从句中也可以用陈述语气:
当说话者认为所述的是真实的或极有可能发生或存在的事实时:
It sounds as if it is raining.听起来像是在下雨。 He talks as if he is drunk.从他谈话的样子来看他是醉了。 ①与现在事实相反
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