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教学内容

本节课所授内容是2013年教育部审定的，由教育科学出版社出版的义务教育教科书（五·四学制）英语七年级下册第十一单元第三课，本节课是一节语法课，要求学生学会区分和运用must, have to, dont have to, must not。通过本课的学习，使学生熟练运用这4个词进行本单元的话题讨论。

教学目标

（1） 知识目标：

词汇: environment, ourselves, stair, anyone

句型: Parents must try to understand their children more.

She has to study for the final exams.

I dont have to go to school on Sundays.

I mustnt be late for school.

（2） 能力目标:

学会区分和运用must, have to, dont have to, must not, 并能用这4个词进行本单元的话题讨论。

（3） 情感目标:

通过活动，让学生学会善于与父母、老师和同学沟通，敢于表达自己的观点和态度，同时也学会尊重他人的观点。

教学重点、难点：

教学重点：区分和运用must, have to, dont have to, must not。

教学难点：准确使用dont have to和must not及have to有人称、数和时态的变化。

教学过程：

Step1 Lead in

T: All the parents love their children and they expect to understand their children more, right?

Ss: Yes.

T: Then, please choose the correct answer. Parents _____ try to understand their children more. ( must / have to)

Ss: Must.

T: Thats right. “must”表示“必须”“一定要”，强调说话人的主观意愿，多指现在或将来的情况。

Ss: Why cant we use “have to” in this sentence?

T: If you use “have to”, it means parents dont care for their children but others make them do this. Thats wrong. “have to” 表示“不得不”“只好”，表示客观上的必要性。此句若用了“have to”，则表示父母本不关心孩子，只是外界或他人要求他们这样做，他们不得不做，所以选“have to”不合情理。

T: Now, look at this one. Please choose the correct answer. Change the word forms if necessary. She _____ study for the final exams. ( must / have to)

Ss: Have to.

T: You are wrong. Pay attention to “she”.

Ss: Has to.

T: Thats right. 注意：have to有人称、数和时态的变化，而must则没有人称、数和时态的变化。Why cant we use “must” in this sentence?

Ss: Because the final exams are coming and she wants to get a good mark. Though she wants to play, she still studies for the final exams.

T: Well done.

Step2 New words

T: First, guess the meaning of the phrases, working environment, school environment, family environment and friendly environment.

Ss:工作环境、学校环境、家庭环境和……（最后一个学生猜测困难，教师可以给出提示或答案“友好氛围”。）

T: Then, look at this sentence. Please choose the correct answer. We _____ protect the environment for future generation. （ must / have to）

Ss: Must.

T: Right. Please explain the reason.

Ss: We all hope to have a good environment. We all do it actively to protect the environment.

T: Good job. Then, look at the sentences.

We ______do our homework ourselves. （ must / have to）

The elevator is broken, so I ________ climb the stairs. （must / have to）

Without anyone knowing, I _____find out the truth myself.（ must / have to）

（设计意图：用同样的方式讲解其他单词，可以让学生更清楚这些单词的用法及must和have to的区别，并准确地应用。）

Step3 Structure

T: Watch the two sentences carefully and find the difference between “dont have to” and “mustnt”.

I dont have to go to school on Sundays.

I mustnt be late for school.

Ss: 第一句是“我周日不必上学”，第二句是“我一定不要上学迟到”。

T：Good. “mustnt”译为“不得”“一定不要”，而“dont have to”译为“不必”“没必要”，第一句是周日休息所以不必上学，而第二句上学不得迟到是规定，是必须执行的。

T: Then，complete Exercise C.

（设计意图：让学生通过观察，总结出两个词的区别和具体用法，然后进行巩固练习。