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Unit 4 Don’t eat in class
课题 Unit 4 第 3 课时 课型 新授 编号 4-3
学科 英语 班级 七年级 领导签字
执笔人 使用人 使用时间
学习目标
1、总结归纳 Section A 部分语法重点;
2、并将所学知识学以致用。
学习重点、
难点
Section A 部分语法重点
课时安排 1 课时
自主预习
翻译
1. be on time for class___________2. in class____________________
3. wear a uniform ______________4. 梦想的学校____________
5. 不必___________________________
展示交流
Step 1 Review
Review the new words in Section A.
Step 2 Presentation
Read the sentences in Grammar Focus and try to remember them
by heart.
Step 3 Practice
(1) Check the answers in 3a. Read the sentences.
(2) Check the answers in 3b. Read the sentences.
Step 4 Consolidation
Make up five cool rules for a dream school. Vote for the Coolest
School.
知识探究
What do you have to do ? 你们必须做什么?
have to 与其他情态动词一样后接动词原形,表示客观上的需要,强调被迫
性,有“不得不”的含义。 have to 可用于多种时态,形式随时态变化而变
化,还可以用在其他情态动词之后。如:
We have to work hard. 我们得努力工作。
I think he may have to help his dad in the garden. 我想他可能不
得不在花园里帮他爸爸。
【辨析 have to 与 must】
(1) 表达意见上的差异: must 表示说话人的主观意图和要求,相当于汉
语中的“必须”;
have / has to 表示由于外部环境、情况、习惯等的客观需要,相当
于汉语中的“不得不”。
如: You must do your homework now. 现在你必须做你的功课。
He has to study late into the night to pass the exam. 为了通过考
试,他不得不学习到深夜。
(2)在否定句和疑问句中,have to 需借助于助动词 do 相关形式,而 must
则直接用 mustn’t 或将 must 提到句首。如:
Your mother doesn’t have to do that now. 你妈妈现在不必做那件事情2
了。
You mustn’t play football in the street after class. 放学后,你们
一定不要在街上踢足球。
(3)must 不能与其他助动词 will,shall 等连用,因此这种情形下要用 have
to。 Must 没有过去式,因此用于过去时应用 had to (表示过去必须做,并
且做到了)。如:
Shall we have to meet at the gate of the school? 我们必须在校门口相见
吗?
He had to get up early to catch the early bus. 他不得不起早床,去赶早班
车。
巩固提升
( )1. I have to _______ the room every morning.
A. clean B. cleans C. cleaning
( )2. — Does she have to go to bed at 9:00?
— Yes, she__________.
A. has B. have C. does
( )3. Don’t listen music in the classroom
hallways.
A. to; and B. to; or C. at; or
( )4. She lost her bike. She _______ walk to school.
A. have to B. has to C. has
( )5. We ________to wear the school uniform every day.
A. not have B. have not C. don’t have