实用标准 文档 知识点①:现在完成时 一.一般现在时用法: ①过去发生的动作对现在造成的影响或结果:强调结果 e.g. 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 e.g. I have lived here since 1990. 二. 现在完成时的构成 have/has+过去分词 三. 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? 四. 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 e.g. I have already found my pen. = I have found my pen already. ②yet 已经 否定句和疑问句句尾 e.g. I have not finished the work yet. Have you bought a computer yet? ③ever 曾经 句中 e.g. Have you ever seen pandas? ④never 从不 句中 e.g. I have never been to Beijing. ⑤just 刚刚 句中 e.g. I have just done my work. 实用标准 文档 ⑥before 以前 句尾 e.g. I have never been there before. ⑦so far 到目前为止 e.g. So far he has learnt 200 words. ⑧how long 多久 e.g. How long have you lived here? ⑨how many times 多少次 e.g.How many times has he been to Beijing? (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 for +一段时间 Jim has lived here for 2 months. since last year since +过去点时间 Lucy has been in Beijing since 3 years ago. since 3 years ago since 1990 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。 e.g. 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...