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综合英语教程李荫华课后答案
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Text A
Because honestly, the mechanic could have shown me an electric can opener and said,"This ispart of your car and it's broken—pay me to fix it," and I wouldn't have known any better.因为说实话，如果修理工给我看一把电动开罐器并对我说:“这是你的汽车部部件，坏了——你付钱我给你修，”我也不会知道他在敲诈。
本句中could have shown和wouldn't have known是虚拟语气。虚拟条件句的主句中用“would /could / might / should + have done”结构，其中could表示本能够做到某事而没有做到; might表示本来也许会发生的事而没有发生; should表示本应该做到某事而没有做到; would表示本来想要做却没有去做。
例: I could have finished the task if I had had more time.如果当时我能有多一点时间，我就能完成这项任务。If it had been fine, we would have gone to the park.如果天气好的话，我们就去公园了。
If you had not interfered, I should have finished my work by now.不是你打扰的话，现在我早已完成我的工作了。
If you had tried a little harder,you might have succeeded.当初你如果再努力一下，说不定你会成功的。
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