2019中考英语----现在完成时态专题讲解 课件(共89张PPT)

现在完成时 The Present Perfect Tense 用法 (一)表示过去发生或已经完成的动作对现在的造成影响或结果.常用的时间状语有already, yet, ever, never, just, before等. 一)构成: have/has+动词过去分词 句式构成 1.肯定句: S(主语）+have/has(助动词）+PP(过去分词)+(其他）。 Sb. have/has done sth. 1.Tom 洗完衣服了。 Tom has washed the clothes. 2.他们已经开完会了。 They have had the meeting. 3.我写完信了。 I have finished writing the letter. 4.Lily 已经打扫房间了。 Lily has cleaned the room. 5.我们看过这部电影了。 We have watched the movie. 1.Tom 洗完衣服了。 2.他们已经开完会了。 2. 否定句: S ( 语)+have/has+not +PP(过去分词)+(其他）。 have not=haven’t has not =hasn’t Sb. haven’t/hasn’t done sth. 2. 否定句: S ( 语)+have/has+not +PP(过去分词)+(其他）。 把这些句子变成否定句。 1.Tom has washed the clothes. 2.They have had the meeting. 3.I have finished writing the letter. 4.Lily has cleaned the room. 5.We have watched the movie. Tom hasn’t washed the clothes. They haven’t had the meeting. I haven’t finished writing the letter. Lily hasn’t cleaned the room. We haven’t watched the movie. 1.Lucy 还没参观过长城。 Lucy hasn’t visited the Great Wall. 2.我们 还没谈论这件事。