这是一套关于《Unit 9 Have you ever been to a museum?》的素材,格式为PPTX,文件大小为12.35 MB,页数为26页,请使用101教育PPT软件打开使用;
用法1. 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。 I have already had my breakfast . (现在我不饿了。)2. 表示动作或状态从过去某一时刻开始,一直延续到现在,而且可能还要继续下去。 I have studied English for two years. (从两年前持续到现在,并还要继续下去)
现在完成时
构成现在完成时是由“助动词have / has+ 动词的过去分词”构成的,规则动词的过去分词==过去式,不规则动词的过去分词则需逐个记忆(参考课本137、138页)时间状语(提示词)already, yet, just, ever, never, before,since,for
句式1. 肯定句:主语 + have / has + 过去分词 (+ 其他)2. 否定句:主语 + have / has + not + 过去 分词(+ 其他)3. 一般疑问句:Have/ Has + 主语 + 过去 分词(+ 其他)4. 特殊疑问句:疑问词 + have / has + 主语 +过去分词 (+ 其他)
already和yet都可以作为现在完成时的标志词,但它们的用法不同。◆already一般用于肯定句句中。如: We have already cleaned up our classroom.◆yet一般用于疑问句和否定句句末。如: Have you seen her yet? The bus hasn’t come yet.
( ) 1.I ______ the movie Lost in Thailand? twice. It’s funny. A. saw B. see C. have seen D. will see( ) 2.—Lunch? —No, thanks. I__________. A. will eat B. am eating C. have eaten( ) 3.—Where is Tom? We can’t find him anywhere. — Perhaps he _____ home. A. has come B. is going C. went D. was going
C
A
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