莫茜 现在完成时课件精要.ppt

动 词 填 空 1._____ you ________(clean) the room? Yes, we __________(do) that already. When _______ you ______(do) it? We _______(do) it an hour ago. 2.______ he ______(see) this film yet? Yes. When _____ he _____(see) it? He ______ it last week. 3. How many times _____you______(be) there? Have cleaned have done did do did Has seen did see saw have been 4. I __________ (read) the novel twice. It’s interesting. 5. She _________(go) to Pairs, hasn’t she? Yes. How ______ she _______(go) there? She _______(go) there by air. 6. So far, many countries _______________(develop) their software programs. 7.Mr Chen ______(give)up smoking last year. 8.Mr Chen __________(give) up smoking since last year. have read has gone did go went have developed gave has given Homework To review what we have learnt today. 2.To recite（背诵） the past tense and past participle of the irregular verbs on P126-129. 八一初中 莫 茜 现在完成时 现在完成时的概念及构成 现在完成时的主要用法 现在完成时的时间状语 have been 与have gone 比较 与一般过去时的用法比较 现在完成时的概念 现在完成时表示过去某个时间已经发生的行为或曾经做过的事情对现在造成的影响或产生的结果。 have (has） + done 现在完成时的构成 助动词 动词的 过去分词 过去分词变化规则如下： 1 、规则动词：规则动词的过去分词的构成规则与规则动词的过去式的构成规则相同。四点变化规则： (1)一般动词，在词尾直接加“ ed ”。 　　work---worked---worked , visit---visited---visited 　　 (2)以“ e ”结尾的动词，只在词尾加“ d ”。 　　live---lived---lived , like---liked---liked　 (3)以“辅音字母 + y ”结尾的动词，将 y 变为 i ，再加“ ed ”。 　　 study---studied---studied , cry---cried---cried 　　 (4)重读闭音节结尾，末尾只有一个辅音字母，先双写该辅音字母，再加“ ed ”。 　　 stop---stopped---stopped , drop---dropped--dropped 2 、 不规则动词变化需参看不规则动词表逐一熟记。（参看教科书P126） 例如: cut- cut- cut, hit- hit- hit. 写出下列动词的过去式及过去分词 1 become_______-_______ 2 break_______-________ 3 bring _______-________ 4 build_______-________ 5 bite_______-________ 6 catch_______-_______ 7 choose________-______ 8 cut________-________ 9 fall_______-________ 10 fly_______-_________ 11 forget_______-______ 12 grow________-______ 13 hit______-______ 14 hurt_____-______ 15 keep_____-____