★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.
2. 現(xiàn)在進行時
表示現(xiàn)在正在進行的動作。
構(gòu)成： 主語＋be動詞＋動詞的現(xiàn)在分詞＋其它成分（現(xiàn)在分詞的構(gòu)成見附錄）
We are having lunch.
He is reading a book.
The dog is running after a cat.
The boys are swimming across the river.
★變疑問句將be動詞移到句首
Are we having lunch?
Is he reading a book?
Is the dog running after a cat?
Are the boys swimming across the river?
★變否定句在be動詞后面加 not
We are not having lunch.
He is not reading a book.
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＋動詞＋主語＋現(xiàn)在分詞
What are you doing?
What is she doing?
What is the dog doing?
(必背)

沒有進行時的動詞
表示狀態(tài)，思想，感情和感覺的動詞不能表示正在進行的動作
1. 表示感覺，感官的詞
see, hear, like, love, want,
2. have, has當(dāng)”擁有”講時沒有進行時
3. 一般過去時
表示過去發(fā)生的動作或事件， 常和表示過去的時間狀語連用，如yesterday, last night, the day before yesterday, 3 days ago,
含有be動詞的句子， 將動詞變?yōu)檫^去式，am, is的過去式為was，are的過去式為were
I was at the butcher’s.
You were a student a year ago.
The teacher was very beautiful ten years ago.
★變疑問句將be動詞移動到句首
Were you at the butcher’s?
Were you a student a year ago?
Was the teacher very beautiful ten years ago?