have had to到底该怎么用? - 知乎
2024年2月4日 · "have had to" 是一个复合时态，表示在过去某个时间点之前发生的动作或情况对当前的影响。 与之相对，"had to" 是过去时态中的一种结构，表示过去的必须或需要。 下面是 …
had to 与have to用法有什么不同 - 百度知道
had to是have to的过去形式， 意思上没多大差别， 只是had to指的是过去， have to指的是现在一般情况。 例如： I have to do my homework now I had to do my homework last night, so I …
Has to, have to, had to in English Grammar - Grammar
2021年5月5日 · Had to – used with I, You, We, They, He, She, It, Name. When to use? If a task means “must do”, then “ have to or has to ” is used according to the subject. But if the task is …
have to结构的划分 - 柯帕斯英语网
2021年3月30日 · have to do 的非限定形式： He has had to do his homework. had 为过去分词。 Having to do his homework, he didn't go with us. having 为现在分词。 I hate having to do …
What is the difference between "had had to" and "have had to"?
In have had to ... the auxiliary is cast in the present-tense form, which is have with a first-person subject, so this is a present perfect. In had had to ... the auxiliary is cast in the past-tense form, …
"have had to" 和 "had to" 和有什么不一样？ | HiNative
'Had to' is past tense. 'Have to' is present. For example, "I have to do my work" is present, while "I had to do my work" is past tense
vs "Have had to - English Language Learners Stack Exchange
2017年1月5日 · The difference between "had to" and "had had to" is similar but in the past instead of the present; the past perfect "had had to" would express a past obligation starting before …
have to do 有几种意思？请给出语境 - HiNative
"have to do" 这个短语在英语中有几种不同的意思，具体的含义取决于上下文。 以下是一些常见的用法： 1. 必须做某事：表示必须做某事，没有选择。 比如： - I have to do my homework …
"Had to do"是什么意思？ -关于英语 (美国)（英文） | HiNative
2020年5月20日 · 第一个had to do，跟...有关 第二个had to do，一定，非要，非得是
have后面+to do,do ,还是doing?我3种都看到过,迷糊了到底怎么 …
have后面+to do,do ,doing这三种都是很常见的. 1.have to do表示“不得不做某事”,例句： I have to do some laundry this evening.我今晚不得不洗衣服. 2.have sb.do表示“让某人做某事”（注 …
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