一般过去时的否定是didn't do,现在完成时的否定是haven't done 或hasn't done 或hadn'

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一般过去时的否定是didn't do,现在完成时的否定是haven't done 或hasn't done 或hadn't done

英语否定句：
凡句中有动词be(am/is /are/was/were) ,情态动词(can/could/may/must/will/would/shall/should/...),助动词(have/has /had 完成时）的,变否定句时直接在这些词的后面加not,否则要加上相应的助动词don't / doesn't (一般般现在时第三人称单数用doesn't),didn't (一般过去时)
注：加了助动词之后原来的动词要用原形 .如：
1.He isn't a worker.(一般现在时）
2.He doesn't go to shcool on foot..(一般现在时）
3.He can't swim.(一般现在时）
4.They weren't at home yeste.（一般过去时）
5.He didn't go to school by bus yesterday..（一般过去时）
6.He won't go with you tomorrow.（一般将来时）
7.He hasn't finished his homework.（现在完成时）
8.He hadn't written to her when she rang him up.(过去完成时）
9.We aren't working now.（现在进行时）
10.They weren't having classes at this time yesterday.（过去进行时）
11.They wouldn't tell you about it.（过去将来时）
12.I shall not go with you.（一般将来时）
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He had done的反义疑问句是hadn't he?还是didn't he? 虚拟语气中wish后的宾语从句为什么用hadn’t do表否定,而不是hadn’t done,不是表示过去完成时的否定吗请问:hadn't done 和hasn't done 和has to do 有什么不同? 为什么是not have done和hadn't done ? until用法的问题直到…才是应该用 haven't done until,还是didn't do until? We didn't have enough food,我想问的是那个have ,可以用haven't否定吗,也就是we 现在完成时否定I haven't seen it从来没有看见它I hadn't noticed 怎么一个个have 一个 use to do的一种否定形式是：didn't used to和didn't use to ? 是hasn't还是haven't 为什么是it doesn't matter而不是it didn't 或haven't matter 请问"must"的否定形式是不是不能表推测?有木有"mustn't have done "滴形式?推测和虚拟是 didn't need to do 与needn't have done 的区别和相同点