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2010-06-11 20:20:39 来源：世博英语
Lesson 64 The Channel Tunnel
If you park your car in the wrong place, a traffic policeman will soon find it.
If it rains tomorrow, we’ll stay at home.
If he is out, I'll call tomorrow.
You'll miss the train if you don't hurry.
If you ate more and talked less, we would both enjoy our dinner!
If I were you, I would not go to London tomorrow.
If you went to the exhibition, you would enjoy it.
If I were in your position, I would act differently.
（2）第3类条件句的基本结构与前两类都不一样，if从句需用过去完成时，主句用 would have/should have+过去分词形式：
If it had rained, we would have stayed at home.
If I had worked harder at school, I'd have gotten a better job.
You would have missed the train if you had not hurried.
If you had gone to the exhibition, you would have enjoyed it.
If you go to the exhibition, you will enjoy it.
If you went to the exhibition, you would enjoy it.)
If I had been in your position, I would have acted differently.
If you could have made him change his mind, you would have saved him a lot of trouble.
在 if从句中可用 could have+过去分词代替 had been able to +动词原形：
If you could have made (=If you had been able to make) him change his mind, you would have saved him a lot of trouble.
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