be動(dòng)詞、一般動(dòng)詞和助動(dòng)詞-wenkub
2023-05-29 06:01:07 本頁(yè)面
【正文】 market every morning.（過(guò)去式）Mother went to a supermarket yesterday.—主語(yǔ)為第三人稱(chēng)單數(shù)時(shí)，動(dòng)詞過(guò)去式不加s。178。且助動(dòng)詞之后用原形動(dòng)詞，因?yàn)橹鷦?dòng)詞表示了時(shí)態(tài)、數(shù)的變化?？隙ň洌褐髡Z(yǔ)+am/are/is…否定句：主語(yǔ)+am/are/is+not…He is a good baseball player.他是一個(gè)好棒球員（否定句）He is not a good baseball player.= He’s not a good baseball player.= He isn’t a good baseball player.be動(dòng)詞的疑問(wèn)句含be動(dòng)詞（am/are/is）的肯定句變成疑問(wèn)句時(shí)，將be動(dòng)詞拿到主語(yǔ)前，句尾加？即可?？隙ň洌褐髡Z(yǔ)+am/are/is…疑問(wèn)句：Am/Are/Is+主語(yǔ)…？ is his camera.那是他的相機(jī)（疑問(wèn)句）Is that his camera? girl is a junior high school student.那女孩是初中生（疑問(wèn)句）Is the girl a junior high school student?O Be動(dòng)詞開(kāi)頭的疑問(wèn)句為一般疑問(wèn)句，可用yes或no回答，而答句中的主語(yǔ)用代名詞（問(wèn)句）Am/Are/Is+主語(yǔ)…？（答句）Yes,主語(yǔ)+am/are/is No,主語(yǔ)+am/are/is not that man your math teacher?Yes, he is./No,he is not. you eating your lunch?Yes, I am./No, I’m not.（2）一般動(dòng)詞的現(xiàn)在式一般動(dòng)詞的含義凡是日常生活中具體的動(dòng)作，如：eat吃飯，walk走路及抽象的動(dòng)作如：like喜歡，think思考…皆為一般動(dòng)詞主語(yǔ)+一般動(dòng)詞人稱(chēng) 數(shù)單數(shù)復(fù)數(shù)第一人稱(chēng)I like dogs.We like dogs.第二人稱(chēng)You like dogs.You like dogs.第三人稱(chēng)He likes dogs.They like dogs.O 一般動(dòng)詞加s或es的方法works/plays。do—用于主語(yǔ)為I/you/復(fù)數(shù)does—用于主語(yǔ)為第三人稱(chēng)單數(shù)she/hedid—用于過(guò)去式，不分人稱(chēng)和數(shù)均可用肯定句：主語(yǔ)+一般動(dòng)詞…否定句：主語(yǔ)+do/does/did+not+原形動(dòng)詞 twin brothers go to school by bus.這對(duì)雙胞胎兄弟坐公交車(chē)上學(xué)（否定句）The twin brothers do not（=don’t）go to school by bus. has dinner at the restaurant.（否定句）Sam does not（=doesn’t）have dinner at the restaurant.比較 否定句He is my boyfriend.He is not my boyfriend.He likes dogs.He does not like dogs.一般動(dòng)詞的疑問(wèn)句含有一般動(dòng)詞的肯定句變成疑問(wèn)句時(shí)，不可將一般動(dòng)詞拿到主語(yǔ)前，必須用助動(dòng)詞do/does/did，且助動(dòng)詞之后用原形動(dòng)詞。 was和were現(xiàn)在式過(guò)去式be動(dòng)詞amisarewaswerebe動(dòng)詞過(guò)去式的否定句含be動(dòng)詞過(guò)去式was/were的肯定句邊否定句時(shí)，在be動(dòng)詞后加not.肯定句：主語(yǔ)+was/were否定句：主語(yǔ)+was/were+not… was a vet.Brown先生是一個(gè)獸醫(yī)（否定句） was not（=wasn’t）a vet. and Brain were in the living room at that time.（否定句）Joe and Brain were not （weren’t）in the living room at that time.be動(dòng)詞過(guò)去式的疑問(wèn)句含be動(dòng)詞過(guò)去式was/were的肯定句變疑問(wèn)句時(shí)，將was/were拿到主語(yǔ)前，句尾加？即可。一般動(dòng)詞過(guò)去式的否定句含一般動(dòng)詞過(guò)去式的肯定句變否定句時(shí)，不可直接在一般動(dòng)詞之后加not，必須用助動(dòng)詞did（不分人稱(chēng)和數(shù)），而助動(dòng)詞之后用動(dòng)詞原形。He doesn’t can speak English. 常見(jiàn)助動(dòng)詞的用法（1）can（could）Can表能力、許可、可能，而could是can的過(guò)去式（=be able to） can speak Japanese, but he cannot（=can’t）write it. will be able to（此處不能用can） finish the paper and go out to see the exhibition tomorrow. haven’t been able to recall his name.我一直想不起他的名字 cannot be true.那不可能是真的 kind of thing can happen every now and then.
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