英語中的時態一共有八種，它們是：一般現在時、現在進行時、一般過去時、
現在完成時、一般將來時、過去進行時、過去完成時、過去將來時。

    今天我們所要講的就是第一種：一般現在時——表示一般性，經常性的動作
或一般性事實。

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

    ★變疑問句將be動詞移到句首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動詞的句子，即含有一般動詞的句子。

    （1 ）第三人稱單數及單數名詞He likes books. She likes him. The dog
likes bones.

    ★變疑問句在句首加does，動詞變為原型Does he like books？

    Does she like him ？

    Does the dog like bones ？

    ★變否定句在主語及動詞之間加doesn't ，動詞變為原型，原句中的動詞不
再有第三人稱變化。

    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：第三人稱單數形式一般在動詞后面加S ，不要和名詞復數混淆，變否
定句或疑問句時名詞復數沒有任何變化。

    （2 ）其他人稱及復數名詞I want to have a bath. We have some meat.
The students like smart teachers.

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

    Do we have any meat ？

    Do the students like smart teachers ？

    ★變否定句在主語和動詞之間加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.