If I were you, I should take his advice.我如是你,就会听他的忠告。(美国英语常用would代替should)。
7) 7) 助动词should(第一人称)和would(第二、三人称)+ have + 过去分词。如:
If father hadn’t sent me, I shouldn’t have come.
三、虚拟语气在非真实条件从句中的用法:
所指时间为现在时,从句用一般过去时(be用were),主句用should/would be 型;所指时间为过去时,从句用had been 型,主句用should/would have been 型;所指时间为将来时,从句用should be 或were型,主句用should/would be 型,例如:
If he had time, he would/could/might go with you. (对现在情况的虚拟)如果他有时间,他就会/能和你去。
If I had had the money last year, I should/would/could/might have bought a house. (对过去情况的虚拟)如果我去年有了这笔钱,我就会/可能买一所房子了。
If there should be/were/were to be something wrong, they would/could/might let you know at once. (对将来情况的虚拟)如果出了什么事,他们会/可能马上告诉你。
如果条件从句中有were, had 或should,可以把if省略,把这几个词放到主语之前,构成主谓倒装,如:Were I you (=If I were you),I would not do it.我要是你,我就不做这事。Were I to meet him tomorrow (=If I were to meet him tomorrow), I should ask him about it. 要是我明天见到他,我会问他这件事的。Had he been more careful(=If he had been more careful),such mistakes could have been avoided. 如果他细心一些,这种错误本来是可以避免的。
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