不是应该would have done吗？怎么第一句和第二句成了wouldn't have bee

wouldn't have done表推测吗~

不是，是 虚拟语气
表示对过去的推测 情态动词中只有would 没有

如
If he had got up late yesterday,he wouldn't have caught the ealy bus.
这句就是虚拟

对过去的推测有must,may,can但不会用would ，给你比较一下
can have done对过去的推测
could have done 虚拟语气（常用否定）

may have done对过去的推测
might have done虚拟语气（本可以）

must have done对过去的推测

would have done虚拟语气（本来要）
should have done虚拟语气（本应该）

will / shall have done 将来完成时（只有时间条件限制才会出来）

一般来说，过去将来完成时 不常出现，可以忽略，所以would have done 是虚拟语气 不是推测

1.这种虚拟语气的句子按道理是应该配套用的：主句had done +从句would have done。但是有些情况下可以用混合型，也就是不完全配套。本句中答案用would have a chance to survive是表示与现在事实相反，也就是说 那他“现在”还可能活着。想一想如果改用would have had a chance的话，就表示与过去事实相反，也就是说那他“当时”就有机会活着——这肯定不是说话者的本意。

2. could have done也表示虚拟语气，它的含义是“本来能做但没有做”，如He could have passed the exam.(本来能考及格但是没有）。本句它和would have done的意思和用法差不多，也不好用。

这种虚拟语气的句子按道理是应该配套用的：主句had done +从句would have done。但是有些情况下可以用混合型，也就是不完全配套。would have done也表示虚拟语气，它的含义是“本来能做但没有做”。这两句话，你难理解的是它的否定之否定。
我首先给你分析第二题，第一题你就能懂了。第二题，可以这么转换一下：I would have been early,if I had taken the subway.句子的意思跟你提供的句子是一样的：如果我搭到了地铁，我就会去的很早（不会迟到）。因为这个句子用的虚拟语气，所以他表达的意思是他没搭到地铁，因此他迟到了。所以你可以把would后面的那个not和late一起看出一个“early”.就能明白了。第一题就同理啦。

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西塞山区13393588431： 虚拟语气对过去事实假设不是应该用would+have+过去分词吗,为什么我做到一道题用would+动词原形? if you ( ) him yesterday,you ( ) what to do.答案给的D. - ？
百洁尼尔：[选项] A. asked,would know B. had asked,would have known C. asked him,know D. had asked,would know

西塞山区13393588431： 29题选d的话,不是应该后面would have done吗,还是答案错误 - ？
百洁尼尔： 上面的理由都是错的.这题是虚拟语气.虚拟语气就是if done+ would do.希望答案对你有帮助.

西塞山区13393588431： would have done, might have done, could have done,should have done分别表示什么意思? - ？
百洁尼尔： 一、在虚拟语气中的用法 1. should have done 表示“过去本应该做某事却未做.”其否定结构 shouldn't have done 表示 “过去本不该做某事却做了.” 2. ought to have done 表示“过去本应该做某事却未做.”其否定结构 oughtn't to have done ...

西塞山区13393588431： 虚拟语气中,would have done,should have done,coul - ？
百洁尼尔： 1. 虚拟语气的句子按道理是应该配套用的:主句had done +从句would have done.2. could have done也表示虚拟语气,它的含义是“本来能做但没有做”,如He could have passed the exam.(本来能考及格但是没有). 3. might have done:①...

西塞山区13393588431： 有英文高手知道吗?would have done 和would do的区别, - ？
百洁尼尔： would have been/done本应是/做… 不是对将来事情的推测,而是表示与过去事实相反的情况,虚拟语气.—————————————————————————————————— 表示与过去事实相反的情况的虚拟语气构成:从句:Had+过...

西塞山区13393588431： 虚拟语气were to的用法If we were to add another row to this table,it would have an identifier of 4.were to在虚拟语气中不是应该表示不大可能发生的事吗,在这... - ？
百洁尼尔：[答案] 虚拟语气除了表达＂不大可能发生的事＂,也可以用于＂假设＂某件事,即假设的事情并没有真正发生.If we were to add another row to this table,it would have an identifier of 4.这句是说,假设,我们添加一条新的记录,那...

西塞山区13393588431： would have had怎么理解 - ？
百洁尼尔： would have had 是虚拟语气.是对过去的虚拟,主要表达的是与事实相反的猜测.用法是:would/could/might等+do(对现在,将来)/have done (对过去)的虚拟 如:I wish I could have gone with you on the picnic,then we would have had a good time.我希望我能和你们一起去野餐,我们一定会玩得很高兴.

西塞山区13393588431： 为什么下面这句话中的would have to不是“不得不...”的意思? - ？
百洁尼尔： have to do sth: 是一个固定表达方式, 表示“不得不做某事”. 因此: would have to buy: 不得不买...(因为有情态动词would,表示并不会买).= 要么买一台... 这是中文语言翻译技巧而已,既要理解英文含义,也要有中文的功底.

西塞山区13393588431： would have done和 should have done的区别是什么?意思分别是什么？
百洁尼尔： would/should + have + 过去分词 这是虚拟语气的一种用法.would have done :表示对过去事情的假设,意思是“本来会做”. 比如:I would have told you all about the boy's story, but you didn't ask me. 我本来会告诉你这个小男孩的故事,但是你...

西塞山区13393588431： would have to跟will have to和have to有什么区别? - ？
百洁尼尔： would have to用于虚拟语气,用于主观情感不是很强烈 will have to用于将来时,与would have to比较,更显示主观性 have to用于现在时,用于客观必须要作的,相对于主观的must . 通过例子来帮助你理解: I have to go for my sister is waiting for me. 是因为别人等你的客观原因你需要走 I must have dinner for I am very hungry. 是因为你肚子饿的主观原因才去吃饭的. 以下情景是员工答复老板: I will do the job well. (双手握紧),自信而肯定地对老板说