这句为什么有两个had had? - 知乎
你好。感谢诚邀。 记住，两个 had 在一起时，就是 have 为 实义动词 的词组（如have a walk ，have a talk ，have a look （at …） ，have a swim ，have a break ，have a discussion，have breakfast / …
When do we use “had had” and “have had”? [duplicate]
15 There's no special magic with " had had ", they don't really go together as a pair anymore than " had wanted " go together. So don't worry so much about how to use " had had " as a unit of grammar, …
如何正确理解 had done、have done、have been doing 这 3 种时态？
如何正确理解 had done、have done、have been doing 这 3 种时态？ 语法书上的那些解释，看来看去都不是很能理解，也谢绝照搬语法书的解释。 看一次，过一段时间又忘了，总不是能很好的区分，也 …
What is the difference between "have had" and "had"?
Feb 12, 2014 · It is used to describe experiences one has had in the past (and that hence influence the experience with which you speak today), changes over time, uncompleted actions, and things that …
had与have had有什么区别？ - 知乎
had是have的过去式（一般过去时） have had 是have的 现在完成时 区别： 1、I had a girlfriend. 我有过一个女朋友，是指过去交过女朋友这件事，但现在没有，即使有，也不是之前那个。 2、I have had …
What does "had had" mean? How does this differ from "had"?
For example, what is the difference between the following two sentences: I had a bad day I had had a bad day
Xiaomi HAD端到端全场景智驾正式发布，有哪些亮点？ - 知乎
36氪获悉，小米董事长兼CEO雷军发布微博表示，Xiaomi HAD端到端全场景智驾正式发布，已开启全量推送。小…
英语里Has Had可以同时出现在一起吗？ - 知乎
Apr 2, 2020 · My friends have had their lunch. 在现在完成时里，have的单复数随主语的人称和单复数变化。 4 总结一下，在现在完成时里，have+过去分词里的have是一个助动词，没有实际词义。 它和 …
grammaticality - Using the word ‘had’ four times in a row is it ...
Apr 25, 2023 · The man that willed me all he had had had had my name on his will since I was born. My mind is broke trying to figure it out.
have had to到底该怎么用? - 知乎
Feb 4, 2024 · - I have had to contend against the unkindness of his sister, and the insolence of his mother; and have suffered the punishment of an attachment, without enjoying its advantages. - And …