If

　　I

　　had worked harder at school, I’d have

　　got a better job. 如果我在学校更用功一些,我可以找到更好的工作. 可以把从句该为到装结构而省略if ,例如: 从句: if + had +过去分词 主句: would/ could/should/might have +过去分词 If

　　I

　　had worked harder at school, I’d have

　　got a better job. == Had I worked harder at school, I’d have

　　got a better job.

　　If I

　　had not seen it with my own eyes, I would not have believed it. = Had not seen it with my own eyes, I would not have believed it. 2.错综时间条件句 主句谓语和从句谓语发生的时间不同,分别选用相应的谓语形式. 如果你听了我的话,你现在也不会有这样的麻烦了. If you’d listened to me, you wouldn’t be in such trouble now. 与过去事实相反; 与现在事实相反 3.含蓄条件句 句子不 一定有条件从句,只是一介词短语,但谓语仍然用虚拟语气. 要不是你帮助,我是不会取得这些成绩的. Without your help, I couldn’t have achieved all this. ==Had it not been for your help, I couldn’t have achieved all this.

　　与过去事实相反; 听他讲话,你会以为他是首相. To hear him talk, you’d think he was Prime Minister. == If you could hear him talk,… 要不是有养老金,他都要饿死了. But for his pension, he would starve. ==If he had no pension,… 与现在事实相反 与现在事实相反

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