英語(yǔ)中的時(shí)態(tài)一共有八種，它們是：一般現(xiàn)在時(shí)、現(xiàn)在進(jìn)行時(shí)、一般過(guò)去時(shí)、
現(xiàn)在完成時(shí)、一般將來(lái)時(shí)、過(guò)去進(jìn)行時(shí)、過(guò)去完成時(shí)、過(guò)去將來(lái)時(shí)。

    今天我們所要講的就是第一種：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)。

    1 、含有be動(dòng)詞的句子He is a teacher. The girl is very beautiful. Tim
and Jack are students.

    ★變疑問(wèn)句將be動(dòng)詞移到句首Is he a teacher ？

    Is the girl very beautiful？

    Are Tim and Jack students ？

    ★變否定句在be動(dòng)詞后面加not He is not a teacher. The girl is not very
beautiful. Tim and Jack are not students.

    ★肯定回答及否定回答Yes ， he is. / No， he is not. Yes ， she is.
/ No， she is not. Yes， they are. / No ， they are not.

    2 、不含有be動(dòng)詞的句子，即含有一般動(dòng)詞的句子。

    （1 ）第三人稱(chēng)單數(shù)及單數(shù)名詞He likes books. She likes him. The dog
likes bones.

    ★變疑問(wèn)句在句首加does，動(dòng)詞變?yōu)樵�型Does he like books？

    Does she like him ？

    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�型，原句中的�?dòng)詞不
再有第三人稱(chēng)變化。

    He doesn't like books. She doesn't like him. The dog doesn't like
bones.

    ★肯定回答及否定回答：Yes ， he does. / No， he doesn't. Yes， she
does. / No， she doesn't Yes， it does. / No， it doesn't.

    注意：第三人稱(chēng)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(wèn)句時(shí)名詞復(fù)數(shù)沒(méi)有任何變化。

    （2 ）其他人稱(chēng)及復(fù)數(shù)名詞I want to have a bath. We have some meat.
The students like smart teachers.

    ★變疑問(wèn)句在句首加do Do you want to have a bath ？

    Do we have any meat ？

    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.
We don't have any meat. The students don't like smart teachers.

    ★肯定回答及否定回答Yes ， I do. / No ， I don't. Yes ， we do. /
No， we don't Yes ， they do. / No， they don't.