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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】
- 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
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