鲁教版五四制8上英语Unit7_语法专项课件（现在完成时2）

这是一份鲁教版五四制8上英语Unit7_语法专项课件（现在完成时2），共15页。

Unit7 语法专项课件（现在完成时2）初中英语鲁教版八年级上册现在完成时三大用法现在完成时三大用法：1.表示到现在为止已经完成或刚刚完成的动作。2.一件发生在过去的事情对现在产生影响。3.一个动作开始于过去，并持续到现在（也许还将持续下去）。现在完成时结构回顾肯定句：主语 + have/ has + 过去分词+...否定句:主语+haven’t ( have not) +过去分词… 主语+hasn’t ( has not ) +过去分词...疑问句:Have / Has+主语+过去分词...?I haven’t finished my homework. Have you finished your homework? I have finished my homework. already一般用于肯定句，意为“已经”，句中句末均可yet一般用于否定句和疑问句，意为“已经” ，句中句末均可Tom has already finished his homework.Tom hasn’t finished his homework yet.易错点1现在完成时常见标志词辨析易错点1现在完成时常见标志词辨析ever用于疑问句，意为“曾经”，位于句中never含否定意义，意为“从不”，位于句中Have you ever eaten fish?I have never eaten fish.易错点1现在完成时常见标志词辨析just多用于肯定句，意为“刚刚”，位于句中before用于所有句式，意为“……之前”，位于句末I have just had my lunch.She hasn’t seen you before.易错点2since/for用法辨析since+时间点since+ 时间段+ agosince+ 从句（一般过去时）John has been a football player since 3 years ago.He has lived in China since 1992.Tom has lived in America since he was a little child.易错点2since/for用法辨析for+ 时间段He has kept the book for 2 weeks.易错点3have been to/have gone to辨析have been tohave gone to去过某地已经回来，可用于任何人称。常与once, twice, three times, ever, never 等连用。去某地了，说话时某人不在现场，常用于第三人称。易错点3have been to/have gone to辨析I have been to Beijing for three times.My father has gone to Shanghai for a meeting.（去了尚未回来）（去过已回来）【典例1】用since/for填空1. My aunt has lived in Australia_______15 days.2. Margaret is in her office. She has been there_____7 o'clock.3. India has been an independent country________1974.考查现在完成时标志词。题1中，15 days为时间段，选用for。题2、3中， 7 o’clock和1974为时间点，选用since。forsincesince【典例2】My parents ________Nanjing twice. A. have gone to B. have been to C. have been in D. are in 考查现在完成时。句意：我父母去过南京两次。have gone to去了尚未回来；have been to去过已经回来，锁定题眼twice，只能选择答案B。【典例3】I haven’t decided when to visit my grandpa ______. A. never B. still C. already D. yet考查现在完成时标志词。句意：我还没有决定什么时候去看我爷爷。never，still仅用于句中，already用于肯定句，yet用于否定句、疑问句，故答案选D。【典例4】Has he _______ been to Shanghai? A. already B. yet C. ever D. still考查现在完成时标志词。句意：他曾去过上海吗？由题目可知为现在完成时。根据句意“曾经”，选用ever。【典例5】Have you met Mr Li ______？ A. just B. ago C. before D. a moment ago考查现在完成时标志词。句意：你以前见过李先生吗？ago用于一般过去时，just用于句中，答案只能选C。