魯教版五四制8上英語Unit7_語法專項(xiàng)課件（現(xiàn)在完成時2）-課件下載-教習(xí)網(wǎng)

Unit7 語法專項(xiàng)課件（現(xiàn)在完成時2）初中英語魯教版八年級上冊現(xiàn)在完成時三大用法現(xiàn)在完成時三大用法：1.表示到現(xiàn)在為止已經(jīng)完成或剛剛完成的動作。2.一件發(fā)生在過去的事情對現(xiàn)在產(chǎn)生影響。3.一個動作開始于過去，并持續(xù)到現(xiàn)在（也許還將持續(xù)下去）。現(xiàn)在完成時結(jié)構(gòu)回顧肯定句：主語 + have/ has + 過去分詞+...否定句:主語+haven’t ( have not) +過去分詞… 主語+hasn’t ( has not ) +過去分詞...疑問句:Have / Has+主語+過去分詞...?I haven’t finished my homework. Have you finished your homework? I have finished my homework. already一般用于肯定句，意為“已經(jīng)”，句中句末均可yet一般用于否定句和疑問句，意為“已經(jīng)” ，句中句末均可Tom has already finished his homework.Tom hasn’t finished his homework yet.易錯點(diǎn)1現(xiàn)在完成時常見標(biāo)志詞辨析易錯點(diǎn)1現(xiàn)在完成時常見標(biāo)志詞辨析ever用于疑問句，意為“曾經(jīng)”，位于句中never含否定意義，意為“從不”，位于句中Have you ever eaten fish?I have never eaten fish.易錯點(diǎn)1現(xiàn)在完成時常見標(biāo)志詞辨析just多用于肯定句，意為“剛剛”，位于句中before用于所有句式，意為“……之前”，位于句末I have just had my lunch.She hasn’t seen you before.易錯點(diǎn)2since/for用法辨析since+時間點(diǎn)since+ 時間段+ agosince+ 從句（一般過去時）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.易錯點(diǎn)2since/for用法辨析for+ 時間段He has kept the book for 2 weeks.易錯點(diǎn)3have been to/have gone to辨析have been tohave gone to去過某地已經(jīng)回來，可用于任何人稱。常與once, twice, three times, ever, never 等連用。去某地了，說話時某人不在現(xiàn)場，常用于第三人稱。易錯點(diǎn)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.（去了尚未回來）（去過已回來）【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.考查現(xiàn)在完成時標(biāo)志詞。題1中，15 days為時間段，選用for。題2、3中， 7 o’clock和1974為時間點(diǎn)，選用since。forsincesince【典例2】My parents ________Nanjing twice. A. have gone to B. have been to C. have been in D. are in 考查現(xiàn)在完成時。句意：我父母去過南京兩次。have gone to去了尚未回來；have been to去過已經(jīng)回來，鎖定題眼twice，只能選擇答案B。【典例3】I haven’t decided when to visit my grandpa ______. A. never B. still C. already D. yet考查現(xiàn)在完成時標(biāo)志詞。句意：我還沒有決定什么時候去看我爺爺。never，still僅用于句中，already用于肯定句，yet用于否定句、疑問句，故答案選D?！镜淅?】Has he _______ been to Shanghai? A. already B. yet C. ever D. still考查現(xiàn)在完成時標(biāo)志詞。句意：他曾去過上海嗎？由題目可知為現(xiàn)在完成時。根據(jù)句意“曾經(jīng)”，選用ever?！镜淅?】Have you met Mr Li ______？ A. just B. ago C. before D. a moment ago考查現(xiàn)在完成時標(biāo)志詞。句意：你以前見過李先生嗎？ago用于一般過去時，just用于句中，答案只能選C。