have + 过去分词 是现在完成时.第三人称时have 要变has.been:1,have you been to Beijing?你去过北京吗(去过,现在人不在北京).2,被动形式,如This project has been finished by Himself.3,表现在完成进行时,表动作由过去持续到现在(或者还会持续下去.)如I have been learning English since three years ag...
现在完成时由助动词have/has+动词过去分词构成过去完成时由had+过去分词构成 相关知识点: 试题来源: 解析 现在完成时和过去完成时里的过去分词没区别.现在完成时是动作发生在过去,但强调的是对现在造成的影响.如:I have eaten the breakfast.我已经吃过早饭了.(现在完成时)I had eaten the breakfast when my ...
1. have的过去式是had，过去分词也是had。2. 在句子里，had可以用来表示过去的动作或状态。3. had作为助动词，可以与动词原形一起构成过去完成时，表示在另一个过去动作之前已经完成的动作。4. 例如，"I had finished my homework before the teacher arrived."（在老师到达之前，我已经完成了我的家...
在have sb / sth doing sth中，doing sth为现在分词短语，在句中作宾语补足语；sb / sth与doing之间存在着逻辑上的主谓关系。有以下两种主要用法：1、多表示“让某人/某物处于做某事的状态”，此时have也可由keep来代替。例如：His parents had him staying at home all the time.他父母亲让他一...
have 或者 had 除了实意（有）外，就是用作助动词，用以构成完成式及完成式的不定式，表示已经 I have found the book. 我已经找到了那本书。（强调找到了书对现在的影响）——现在完成时 I had found the book. 我已经找到了那本书。（强调找到了书对过去的影响）——过去完成时 I find the...
have 或者 had 除了实意（有）外，就是用作助动词，用以构成完成式及完成式的不定式，表示已经 I have found the book.我已经找到了那本书。（强调找到了书对现在的影响）——现在完成时 I had found the book.我已经找到了那本书。（强调找到了书对过去的影响）——过去完成时 I find the bo...
3. She had never seen such a beautiful sight.4. They had discussed the plan before the meeting.5. He has had enough of this nonsense.6. The child had a toy in each hand.7. By the time they left, they had visited all the exhibits.8. We had expected him to be there....
(主要用在否定句、疑问句或惊叹句中) Can this be true?这可能是真的吗?How can you be so careless!你怎么能这么粗心!This can not be done by him.这不可能是他做的。 3. “can(could) + have + 过去分词”的疑问或否定形式表示对过去发生的行为怀疑或不肯定。如: He can n...
有( have的过去式和过去分词 );(亲属关系中)接受;拿;买到 英英释义 have n.a person who possesses great material wealth 同义词:rich personwealthy person v. have or possess, either in a concrete or an abstract sense 同义词:have gothold
1 I have read the book before.我以前读过这本书。2 She has been to London. 她去过伦敦。3 He has not received your letter since you left.自从你离开后，他从来没有收到过你的信。