现在完成时既涉及过去,又联系现在，很多同学不太能明白其中的多种用法，今天，小编为同学们收集、整理了有关现在完成时的用法详解，一起来看看吧！

用法一：表示过去发生或已经完成的某一动作对现在造成的影响或结果.常与just（刚刚）,already（已经）,never（从来没有）,ever（曾经）,before（以前）,yet（仍然）,

once（一次）,twice（两次）,many times（很多次）,how many times（多少次）,so far（迄今为止）,during the past（last）three years（最近三年来）等连用.

※副词的位置：①just常用于肯定句中,放在have / has后,He has just come .

②never表示否定, 放在have / has后, He has never visited the Great Wall.

③ever用于疑问句中,句型为: Have / Has＋主语＋ever ＋过去分词?“…曾经……过吗?”用于询问某人过去的经历.Have you ever been to the farm?

④before用于句末,The woman has never heard of that before.

⑤yet 用于句末或not 之后.Has the train arrived yet? No, not yet.

⑥already用于肯定句, have / has 之后或句末.We have already finished it.

⑦so far用于句首或句末. So far, we have visited the moon.

用法二：表示过去已经开始,一直延续到现在的动作或状态.时间状语有：

①for＋表示一段时间的词语I have taught English for 19 years.

②since＋表示过去时间点的词语He has been at this school since 1986.

③since＋表示过去的时间状语从句I have lived here since I was born.

④since＋一段时间＋ago. I have known him since 20 years ago.

看完了上面的语法知识，相信大家已经对现在完成时的用法有了更进一步的理解，喜欢就收藏吧~