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, …
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 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
have had to到底该怎么用? - 知乎
- 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 all this has been …
grammar - Use of "have had" , "had had", "has had" - English Language ...
The past perfect form of have is had had (had + past participle form of have). The past perfect tense is used when we are talking about the past and want to refer back to an earlier past time.
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.
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…
Is saying "I had a fever" correct? - English Language & Usage Stack ...
12 Working on the principle that "correct language" is defined as the common usage among native speakers of the language: "I had a fever" is correct. I don't think I've ever seen "I had fever" in print …
两个had/have在一起……是什么句型？ - 知乎
这个比较复杂，你可以看看百度一下现在完成时具体看看。 第一个have 是助动词，类似于一般现在时里的do，无实际意义。 第二个had是have的过去分词，是实意动词，有实际意义。 例句：I have had …