六年級(jí)下冊(cè)英語(yǔ)課件-小學(xué)英語(yǔ)句型轉(zhuǎn)換之肯定句變否定句 全國(guó)通用

1、小學(xué)英語(yǔ)句型轉(zhuǎn)換 肯定句變否定句 一、概念：一、概念：什么是肯定句和否定句？什么是肯定句和否定句？ 肯定形式肯定形式肯定句肯定句 否定形式否定形式否定句否定句 陳述句陳述句 陳述句：說(shuō)明一件事情、一個(gè)想法，提出一個(gè)陳述句：說(shuō)明一件事情、一個(gè)想法，提出一個(gè) 觀點(diǎn)或表達(dá)自己心情的句子。特點(diǎn)是：句末都觀點(diǎn)或表達(dá)自己心情的句子。特點(diǎn)是：句末都 是句號(hào)，用降調(diào)讀！是句號(hào)，用降調(diào)讀！ 肯定句變否定句的方法肯定句變否定句的方法 1.含“be動(dòng)詞和情態(tài)動(dòng)詞”型，直接在be動(dòng)詞或情態(tài) 動(dòng)詞后加not,其它照抄不變。 be動(dòng)詞包括：am,is,are,was,were. 常見(jiàn)的情態(tài)動(dòng)詞有：can,could,wo

2、uld,will,may等等。 例句：I am a student. I am not a student. He is a boy.He is not/isnt a boy. I can speak English. I can not/cant speak English. 肯定句變否定句的方法肯定句變否定句的方法 注意縮寫(xiě)：注意縮寫(xiě)： is not = is not = isntisnt, are not =, are not = arentarent , , was not = was not = wasntwasnt, were not = , were not = werentwe

3、rent, , am not am not沒(méi)有縮寫(xiě)，沒(méi)有縮寫(xiě)， 但是但是I am = I am = ImIm can not = can not = cantcant, would not = , would not = wouldntwouldnt could not = could not = couldntcouldnt, will not = , will not = wontwont 肯定句變否定句的方法肯定句變否定句的方法 2.含“實(shí)意動(dòng)詞”型，轉(zhuǎn)換否定句時(shí)，記住五個(gè) 字“一加一還原”的原則?！耙患印奔丛趯?shí)意動(dòng) 詞前加助動(dòng)詞的否定dont,doesnt或didnt。 “一還原”即把

4、句中的實(shí)意動(dòng)詞變回原形。 注意：在一般現(xiàn)在時(shí)中，當(dāng)主語(yǔ)是第一、二人稱或復(fù)數(shù)時(shí)，加 dont來(lái)否定；當(dāng)主語(yǔ)是第三人稱或單數(shù)時(shí)，加doesnt來(lái)否定； 在一般過(guò)去時(shí)中，一律用didnt來(lái)否定。 例句：I like apples. I dont like apples. He likes apples. He doesnt like apples. She worked last night. She didnt work last night. 肯定句變否定句的方法肯定句變否定句的方法 要注意的特殊情況要注意的特殊情況： 遇到some 變 any; 遇到too/also變either; 遇到and

5、 變 or; 遇到always 變 never。 例句:1.There are some boys in the classroom. There arent any boys in the classroom. 2.The girl can sing and dance. The girl cant sing or dance. 相關(guān)練習(xí)： 1.Mike would like some chicken. Mike_like _ chicken. 2.He often goes to bed at ten. He often _ _ to bed at ten. 3.Mary is a teacher,too. Mary _ a teacher ,_. 4.They went to Shanghai yesterday. They _ _to Sha