Unit 4
Don’t eat in class.
Review:
Example:
肯定祈使句 否定祈使句
Sit down.
Come in.
Eat in class.
Listen to music outside.

5. Do your homework at school.
Don’t sit down.
Don’t come in .
Don’t eat in class.
Don’t listen to music outside.
Don’t do your homework at school.
表示请求,建议,命令,禁止等语气的句子, 其结构为省去主语you,以动词原形开头 .
祈使句
must与have to
在英语中，must与have to都可以表示“必须”，但其用法有所不同。
must表示说话人的主观看法，认为有义务必要。
如：我们必须努力工作。（是我们要这样做的） We _______ _______ _______.
have to 表示客观需要，即周围的环境、习惯、协约等要求某人“不得不作某事”。
如：我们不得不努力工作。（环境使我们不得不这样做）We ______ ______ _______ _____.
must study hard
have to study hard
(2)must的否定形式为 _________, 表示“不应该”、“不许可”、“禁止”等， have to的否定形式为_____________,表示“不必要”。
如：你们不能在马路上踢足球。
You _______ play football on the road.
你今天不必练钢琴了。
You _______ _______ ______ practice the piano today.
mustn’t
don’t have to
mustn’t
don’t have to
练一练：
1.He has to stay at home.
否定：He _______ ______ _____ stay at home.
一般疑问：_______ he ______ _____ stay at home? Yes, he ______. / No, he _______.
划线提问：______ _____ he _____ ____ ____?
2. She ___ come early next time.
A. don't have to B. hasn’t to
C. doesn't has to D. doesn’t have to
3. Does she have to get up so early tomorrow morning?
Yes, she ________.
A. is B. have C. has D. does
doesn’t have to
Does have to
does doesn’t
What does have to do
4. I like the party so much, but I ___ go home. It’s too late.
A. must B. have to C. may D. can
5. Does Linda ___ to go to school on weekends?
No, she ___.
A. have, don't B. has, doesn't
C. have, doesn't D. has, haven’t
1 在教室里：
在课堂上：
在走廊上：
在餐厅里
在学校里：
in the classroom
in class
in the hallways
at school = in school
单元知识点
2 下课后：
放学后：
在上学的晚上：
在晚上：
在上学的白天 ：
到10点钟之前：
after class
after school
on school nights
at night
before 10 o’clock
on school days
in the dining hall
3.不要迟到：
上课/上学不要迟到：
Don’t arrive late
=
Don’t be late
Don’t arrive late for class/school.
=
Don’t be late for class/school.
4.见朋友
帮妈妈做早饭
See friends
help his mom make breakfast
5. 穿着校服
穿上校服
戴帽子
wear uniforms
wear a uniform
put on uniforms
put on a uniform
6. 听音 乐
listen to music
wear a hat
wear hats
7. 洗盘子
do the dishes
7. He has _____ _____ things to do today.
I have _____ _____ homework to do.
too many /too much
too many
too much
8. Let’s practice _________(speak) English .
speaking
9.她必须十点前睡觉
She _____ ___ go to bed _______ ten o’clock.
has to before
10.她不得不练习吉他在8点后
She has to_______ ___ _____ ____ ten o’clock.
practice the guitar after
必背句子
1.  你们学校有什么规定？
 2. 不要在走廊上跑，不要迟到。

3.  你们在学校不得不穿校服吗？

4. 你还有别的不得不做吗？

5. 十点钟前我就得上床睡觉。

6. 家里有太多的家规。
What are the rules at your school?
Don't run in the hallways and don't arrive late for class.
Do you have to wear a uniform at school?
What else do you have to do?
I have to go to bed before ten o'clock.
There are too many rules at home.
7.晚饭后我也不能放松。

8. 看电视之前我必须读书。

9. 我知道你的感觉。

10.有许多事情你可以做。

11.我们能带音乐播放器到学校吗？

12. 我们不得不在图书管理保持安静。
After dinner, I can’t relax either.
I must read a book before I can watch TV.
I know how you feel.
There are a lot of things you can do.
Can we bring music players to school?
We have to be quiet in the library.
词汇
1.You must not break the (规定).
2.We can’t make too much noise in the
(大厅走廊).
3.We have to wear (校服) for gym class.
4.He (步行) two kilometres to work every morning.
5.She has to (洗) the dishes after meals.
rules
hallways
uniforms
walks
do
一。根据汉语意思完成句子。
1。不要说话。 ———— ——— 。
2。我每天不得不在6：30起床。I —— —— get —— —— 6：30 every day。
3。上班不要迟到。 ———— arrive —— ——work。
4。他必须在11点钟以前睡觉。He —— to go to bed —----—11：00。
5。在我们学校能戴帽子吗？--不能。
6。你们必须每天读英语吗？—是的。
——you —— ——read English every day？ —Yes， we ——。
—— we —— hats ——school？ --No，we ——。
二。翻译下列词组或句子。
1。上课时 2。不得不
3。禁止谈话 4。禁止吸烟
5。请不要在走廊上奔跑。
6。请不要在教室里吃东西。
Don，t
taik
have to
up at
Don，t
late for
has
before
Do
have to
do
Can
wear
in
can，t
in class
No talking！
No smoking！
Don，t run in the hallways.
Don，t eat in the classroom.
have to
See you!