讲解现在进行时的语法结构
1、谓语构成：be (am/ is/ are)＋v-ing （动词的现在分词）
【注意】be动词要与主语的人称和数保持一致。

如：
I’m watching TV now. 我现在正在看电视。

They’re playing football. 他们正在踢足球。

2、现在分词的构成。

（1）一般情况下在动词词尾加ing。

go→going ask （问，询问）→asking look→looking （2）以不发音的e结尾的动词，去掉e加ing。

have →having take→taking make（做，制造）→making write（写）→writing （3）以一个辅音字母结尾的重读闭音节，双写最后一个字母，再加-ing。

get→getting sit（坐）→sitting put（放）→putting run（跑）→running swim→swimming begin（开始）→beginning shop→shopping
(4) 特殊形式lie-lying die-dying
五、完成下列句子的否定句和一般疑问句的转换
He is running. 他正在跑。

The students are cleaning the room now .
We are sitting in the living room.
六、习题
1. Look! There _____(be) a lot of people over there. What _______they __________ (do) now?
2. —What __________ your mother __________ (do)? —She is a teacher.
3. It __________ (rain) heavily outside now. You must stay at home.
4. Don’t sing. The baby __________(sleep).
5. My brother __________ (not like) playing basketball, but he ______ (like) playing football.
6. —What _________ you usually _________ (do) on Sunday?
—I usually _________ (stay) at home and _________ (do) my homework.
7. Listen! The girls _________ (sing) in the next room.
8. My sister _________ (want) to be a teacher.
9. It’s seven o’clock now. The Green s _________ (have) supper.
10. He often _________ (swim) on Sundays. Look! He _________ (swim) at the pool.。