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, …
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
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 …
这句为什么有两个had had? - 知乎
还有“4个had”和“11个had”的句子，道理是一样的。 详解如下： 1. All the faith he had had had had no effect on the outcome of his life. 词汇分析： ① 前面的had had，是 (that) he had had这个定语从句的 …
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 …
present perfect - When is it necessary to use "have had"? - English ...
Nov 10, 2010 · I have come across a few sentences that contain "have had". I would like to know in what kind of situations we should use this combination.
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 …
grammar - had vs. had had - English Language & Usage Stack Exchange
May 15, 2016 · The second one doesn't technically make it clear that you had eaten the chocolates before dinner, but then again it's really the only possible meaning in that context so the two …
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…