现在完成时态 现在完成时态 1. 用法：①过去发生的动作对现在造成的影响或结果：强调结果 例：Yesterday I finished my homework, that’s to say, I have finished my homework now. ②过去已经开始一直持续到现在的动作或状态：强调继续 例：I have lived here since 1990. 2. 现在完成时的构成 have /has+过去分词 3. 现在完成时的四个基本句型 肯定句 He has finished the work. 一般疑问句 Has he finished the work? 否定句 He has not finished the work. 两回答 Yes ,he has. No, he hasn’t. 特殊疑问句 What has he done? 4. 在下列情形下用现在完成时 1九词语 ①already 已经 肯定句中或句尾 ②yet已经 否定句和疑问句句尾 ③ever曾经 句中 ④never从不 句中 ⑤just刚刚 句中 ⑥before以前 句尾 ⑦so far到目前为止 ⑧how long多久 ⑨how many times多少次 2两词组 havegone to去了某地 例：He has gone to Beijing (去了北京) havebeen to去过某地 例：He has been to Beijing. (去过北京) 3两结构 for two months since last year since 3 years ago since 1990 1 / 31 / 3 for +一段时间 since +过去点时间 Jim has lived here for 2 months. Lucy has been in Beijing since 3 years ago. 现在完成时态 since he came here since +过去时态句子 He has been in China since he came here. 4如果句子里面没有时间状语，汉语意思能够加“已经”，往往用现在完成时态。 例：Have you lost your library book? 你已经弄丢了从图书馆借的那本书吗？ 5现在完成时态还常常用于下列句型 They have planted many trees in the last few years. 在过去的几年，他们已经种了很多树。 This is the best book I have ever read. 这是我曾经读过的最好的一本书。 It is the first time I have played the computer games. 这是我第一次玩电脑游戏。 6. 在现在完成时中，一次性动词不能和一段时间状语连用 例：He has bought the book for 3 years.（错） 因buy这个一次性动词不能和一段时间for 3 years连用, 改正的办法有五种： ① He has bought the book.. (去掉一段时间for 3 years) ② He bought the book 3 years ago (改为一般过去时，使句子的意思不变) ③ It’s 3 years since he bought the book. = 3 years has passed since he bought the book. （改为固定句型 It is ---since---） ④ He has not bought the book for 3 years. （改为否定句） ⑤ He has had the book for 3 years. （用延续性动词have代替buy） 7. 还有其他一次性动词也是这种情况，可参照前面的五种办法改正，前四种改法都一样，第五种改法各不相同，举例如下： ①come/arrive/get to/reach → be here ②leave/go →be away ③begin/start →be on ④open →be open / close → be closed ⑤die →be dead ⑥finish/end→ be over ⑦ borrow → keep ⑧buy /catch → have 还有其它的归纳如下： Break---- be broken get up--- be up marry → be married become → be become interested in → be interested in lose → be lost 2 / 32 / 3 本文来源：https://www.wddqw.com/doc/016caaa9f66527d3240c844769eae009591ba20c.html