外研版三年级知识梳理3

知识梳理（3）
一、现在进行时的陈述句：描述正在发生的事情。

句型结构：主语 + be动词 + 动词的现在分词 + 其他.
例句： I am playing football.
You are dancing.
He is listening to music.
Amy is sleeping.
Lingling and Amy are flying the kite.
二、现在进行时的否定句:描述他现在没有做的事情。

句型结构：主语 + be动词+not + 动词的现在分词 + 其他.
例句： I am not playing football.
You are not dancing.
He is not listening to music.
Amy is n’t sleeping.
Lingling and Amy aren’t flying the kite.
三、现在进行时的一般疑问句：询问他人现在是否做某事。

句型结构： Be动词 + 主语 + 动词的现在分词 + 其他?
例句：Am I playing football? Yes, you are./ No, you are not.
Are you dancing? Yes, I am./ No, I’m not.
Yes, we are. / No, we are not.
Is she listening to music? Yes, she is./ No,she’s not.
Is Sam swimming? Yes, he is./ No, he’s not.
Are they walking? Yes,they are./ No,they’re not.
四、现在进行时的特殊疑问句：询问他人现在做某事。

句型结构：特殊疑问词+ be动词 + 主语 + doing?
例句： What am I doing? You are singing.
What are you doing? I am dancing./We are dancing.
What is he/she doing? She/ he is playing.
What are they doing? They are swimming.
趁热打铁
一、看图匹配,将图片字母填在与词汇对应的横线上。

a. b. c. d. e. f. g. h.
reading tidying drinking eating talking singing hiding running ______ _____ ______ ______ ______ ______ _______ _______
二、选择正确的单词填写在横线上，使句意完整。

1. Sam ______( is / am / are ) playing hide and seek.
2. What_________( is / am / are ) Amy and Lingling doing?
3. _________(What /Where) are Daming and Sam ?
4. ______( Is / Am / Are )Sam tidying his room now?
5. Please ________(reading/ read) books in the classroom.
6. I＿＿＿＿＿(am not/isn’t / aren’t) doing my homework.
7. I ＿＿＿＿＿(is /are / am) running.
8. Lingling and Amy＿＿＿＿＿(isn’t / aren’t) playing five-stones.
9. _____ (Is /Are) they drawing a picture?
No, they________( isn’t / am not / aren’t ) .
10. Look! Lingling is_________ ( call/ calling) Amy.
They ______( is / am / are ) talking.
改错区：。