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1、Unit 4 Dont 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 ReviewReview the new words in Section A.Step 2 PresentationRead the sentence
2、s 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 ConsolidationMake 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 t
3、o 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
4、： 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mustnt 或将must 提到句首。如：Your mother doesnt have to do that now. 你妈妈现在不必做那件事情了。You mustnt play football in the street after class. 放学后，你们一定不要在
5、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（
6、 ）2. Does she have to go to bed at 9:00? Yes, she_. A. has B. have C. does（ ）3. Dont listen music in the classroom hallways. A. to; andB. 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. dont have2
