英語(yǔ)全部語(yǔ)法

一． 時(shí)態(tài)：

1. 一般現(xiàn)在時(shí)表示一般性，經(jīng)常性的動(dòng)作或一般性事實(shí)。u 含有be動(dòng)詞的句子He is a teacher. Tim and Jack are students. ★變疑問句將be動(dòng)詞移到句首 Is he a teacher? Are Tim and Jack students?★變否定句在be動(dòng)詞后面加not He is not a teacher. Tim and Jack are not students.★肯定回答及否定回答Yes, he is. No, he is not. Yes, they are. No, they are not.u 不含有動(dòng)詞的句子，即含有一般動(dòng)詞的句子

第三人稱單數(shù)及單數(shù)名詞 He likes books. The dog likes bones.★變疑問句在句首加does, 動(dòng)詞變?yōu)樵?Does he like books? Does the dog like bones?★變否定句在主語(yǔ)及動(dòng)詞之間加doesn’t, 動(dòng)詞變?yōu)樵?He doesn’t like books. The dog doesn’t like bones.★肯定回答及否定回答：Yes, he does. No, he doesn’t. Yes, it does. No, it doesn’t.注意：第三人稱單數(shù)形式一般在動(dòng)詞后面加S，不要和名詞復(fù)數(shù)混淆，變否定句或疑問句時(shí)名詞復(fù)數(shù)沒有任何變化。 其他人稱及復(fù)數(shù)名詞 I want to have a bath. The students like smart teachers. ★變疑問句在句首加doDo you want to have a bath? Do the students like smart teachers?★變否定句在主語(yǔ)和動(dòng)詞之間加don’t.You don’t want to have a bath. The students don’t like smart teachers. ★肯定回答及否定回答Yes, I do. No, I don’t. Yes, they do. No, they don’t. 2. 現(xiàn)在進(jìn)行時(shí) 表示現(xiàn)在正在進(jìn)行的動(dòng)作。 構(gòu)成： 主語(yǔ)＋ be動(dòng)詞＋動(dòng)詞的現(xiàn)在分詞＋其它成分（現(xiàn)在分詞的構(gòu)成見附錄） The dog is running after a cat. The boys are swimming across the river.★變疑問句將be動(dòng)詞移到句首 Is the dog running after a cat? Are the boys swimming across the river?★變否定句在be動(dòng)詞后面加 not The dog is not running after a cat. The boys are swimming across the river.★特殊疑問句：what, which, how, where, who, etc.疑問詞＋動(dòng)詞＋主語(yǔ)＋現(xiàn)在分詞 What is the dog doing? (必背 )沒有進(jìn)行時(shí)的動(dòng)詞表示狀態(tài)，思想，感情和感覺的動(dòng)詞不能表示正在進(jìn)行的動(dòng)作 1. 表示感覺，感官的詞 see, hear, like, love, want, 2. have, has當(dāng)”擁有”講時(shí)沒有進(jìn)行時(shí)

3. 一般過去時(shí) 表示過去發(fā)生的動(dòng)作或事件， 常和表示過去的時(shí)間狀語(yǔ)連用，如 yesterday, last night, the day before yesterday, 3 days ago, 含有be動(dòng)詞的句子， 將動(dòng)詞變?yōu)檫^去式，am, is的過去式為was，are的過去式為were