现在完成时是什么意思（现在完成时是什么）

如今完成时是英语中的一个紧张时态，是昔时爆发或已经完成的行动对如今变成的劝化或了局。小编为网友整理了一系列如今完成时的英语语法知识，一起来瞧瞧吧！

（二）否认式主语＋助动词have ／has＋not＋过去分词＋另外表明：现在完成时组成否认句时,只要在助动词have/has背后加not就行。have not,has not的缩略式分别为haven't，hasn't。其余，肯定句中有some，already时，改成否认时要分别改为any，yet。实例：1）I haven't finished my homework yet．我还没有完成我的作业.2）She hasn't travelled on a train. 她没有坐火车观光过。3）We have never spoken to a foreigner. 我们从来没有和外国人说过话。注：偶尔not能够用never接替，默示“从来没有”的乐趣。又如：4）I have never seen him before. 昔时我从来没有见过他。

（三）日常疑难式助动词Have ／Has ＋主语＋过去分词＋其余 ?讲明：把陈述句中的have或has放到句首,句末打问号,同时把句中的some ,already改成any ,ye t就构成了日常疑难句.一定回复用“Yes ,主语＋have／has．否认回复用“No,主语＋haven't／hasn't．”偶然也可以用“No,not yet．／No ,never．／No,not even once．”等.实例：1）Have you ever made dumplings ?你曾经做过饺子吗?Yes ,I have ．是的,我做过.2）Has she ever been abroad ?她曾经出过国吗?No,never．不,从来没有.3）Have they found the lost books yet ?他们已经找到了失去的书吗?Yes ,they have．是的,他们找到了.注意：当句中有否认词not ,hardly（几乎不）,never的时刻,在改成反意疑难句时,附加一些用一定体式格局.比如：You have never come to our school, have you? 你之前从来没有来过我们私塾，是吗?

二、目前完成时的用法（一）目前完成时的用法1：体现往日爆发或已经完成的某一行动对目前变成的感化或结局.此时,常与时间副词already（已经） ,yet（还、已经） ,just(刚才、只是) ,ever（曾经） ,never（从不） ,before（之前）等连用.这几个副词的用法如下：1．already意为“已经”,通常用于肯定句中,可放在助动词之后,往日分词以前,也可以放在句末。实例：1）I've already read this book. 我已经读过这本书了.“读”这一行动爆发在往日,对目前变成的感化是“知道书中的内容”。2）I've washed my clothes already．我已经洗了衣服。洗衣服的行动已完成,其结局是“衣服冼清洁了”。注意：在体现惊讶或明知故问等豪情色采时,already也可用于（白话）疑问句中。实例：3）Have you met him already ?你（果真）已经见过他了?2．yet用在疑问句中意为“已经”,用在否定句中意为“还”,常放在句末。实例：1）Has he found his watch yet ?他已经找到他的手表了吗?No,not yet．不,尚未.2）The woman hasn't found her dog yet ．那位主妇尚未找到她的狗。（没找到狗,心坎焦急,这就是对目前的感化）3．just意为“刚才”,体现行动刚才往日,常放在助动词与往日分词之间。实例：He has just come back from school. 他刚从黉舍返来。4．ever意为“曾经”,用于疑问句或否定句中，放在助动词与往日分词之间。实例：1）Have you ever been to Hong Kong? 你曾去过香港吗?2）I haven't ever spoken to her. 我不曾和她说过话。5．never意为“从来没有”常与before连用（before要放在句尾,而never多放在助动词与往日分词之间）。实例：I have never travelled by plane before．我之前从来没有乘飞机游历过。6．before意为“之前”,指往日不确定的某个时间,老是放在句末,不受句型的制约。实例：1）Have you been to Hainan before? 你之前去过海南吗?2）I haven't eaten Guangdong food before. 我之前没吃过广东菜。

（二）如今完成时用法二2延续性用法（肯定句,疑问句中谓语动词必须是延续性动词）：默示往日已经开始,延续到如今的行动或形态.此时常与“for ＋一段时间、或“since＋往日的点时间或从句（从句用通常往日时）以及so far（到目前为止）等时间状语连用。for + 段时间since +点时间

实例：1）I've lived here since 1990．自从1990年从此我就住在这边。= I've lived here since 13 years ago.= I've lived here for 13 years.= It is 13 years since I began to live here.2）I haven't seen him for three years ．我三年没有望见他了。= I haven't seen him since three years ago.= I haven't seen him since 2000.= It is 3 years since I saw him last time.3）Mr Wang has worked in the factory since he came to the city.自从到这个都市从此,王先生一直在这家工场工作。4）She's been at this school since five years ago.自从五年前从此她就在这个黉舍.介意：①在这类句子的肯定句和疑问句中谓语动词必须用延续性动词。短暂性动词因为举动不行赓续,故不行与for(到达；累计)或since（自从...到目前）引出的时间状语连用.②对for和since向导的时间状语提问要用How long1） 他入团两年了.误：He has joined the League for two years．正：He has been a League member for two years．2）我买这辆自行车三年了.误：I have bought this bike for three years．正：I have had this bike for three years．2） ▲一些短暂性动词与之相对的延续性动词：短暂性动词 延续性动词die → be deadborrow → keepbuy/catch → haveget up → be upcome → be infinish → be overleaver → be awayopen → be openclose → be closedbegin → be onbecome interested in → be interested in

有人可能会问：一样平常往日时和而今完成时所体现的行动都爆发在往日，那么这两种时态有甚么不同呢?☆答：①一样平常往日时与切实其实的体现往日时间状语如：yesterday连用；夸大行动在往日爆发，与而今无关。②而今完成时与自已的特性词连用,夸大往日爆发的行动对而今的浸染或往日开始爆发一贯不断到而今的行动。例： He saw the film last night. (往日时,体现他昨晚看过那部片子了，而今不知还要不要再看一次)He has (ever) seen the film before.（而今\完成时，表时他已看过那部片子，而今不想再看了）用于而今完成时的句型1）It is the first / second time…. that…组织中的从句一些，用而今完成时.It is the first time that I have visited the city.It was the third time that the boy had been late.2）This is the… that…组织,that 从句要用而今完成时.This is the best film that I've (ever) seen.这是我看过的最好的片子.This is the first time (that) I've heard him sing.这是我第一次听他唱歌.