九上第八单元Section B(3a－Self Check)

Section B(3a－Self Check)

备课时间：2017. 10.11   使用时间：2017. 10.28

Studying  aims

1．重点词组：mystery

2．重点短语：a bit，at work，right now

3．重点句式：

She"s the only one who wears such colorful clothes.

I just talked to her on the phone，and she"s at work right now.

熟练掌握情态动词表示推测及连词的用法。

熟练掌握情态动词表示推测及连词的用法。

一、预习课本P63－64页新单词并背诵，完成下面的汉译英。

1．奥秘________

二、认真预习3a－Self Check找出下列短语和句型。

1．一点儿________________________________________________________________________

2．在工作________________________________________________________________________

3．现在________________________________________________________________________

4．她是唯一一个穿彩色衣服的人。

________________________________________________________________________

5．我刚才在电话中和她交谈了，现在她正在工作。

________________________________________________________________________

Step 1　情景导入

Teacher：Hello，everyone.Today we are going to learn Unit 8，from Section B 3a to Self Check.In this class we will review how to use “must” to show that you think something is true. We also review how to use “might” or  “could” to show that you think something is possibly true and how to use “can"t” to show that you think something is not true.And we will learn how to write a composition with these words.

环节说明：开门见山地提出本节课的学习目标，简单、直接、明了。

Step 2　完成教材3a－3b

1．读3a中的短文，你认为那个声音可能是什么？列出你的观点，然后把3a表格填写完整，然后小组内互相交流看看谁能想出较具想象力的解释。(5分钟)

2．根据报纸的开头，及3b中的提示按要求写一篇短文，请一名学生在黑板上板书文章，其余同学完成后小组内互相交流，借鉴好词好段。教师点拨黑板上板书的作文。(10分钟)

参考案例

Last week，in a quiet town，something strange happened.People in the town often heard strange noise outside their windows.They tried to solve the problem，but they couldn"t find anything strange.So people in the town were feeling uneasy.

We now know what was happening in the neighborhood.A director of the local zoo said that three monkeys escaped from the zoo and came to the neighborhood by accident.Maybe they felt excited being free and that"s why they made so much noise.

Now the mystery is solved.People in the neighborhood now feel quiet and happy again.

环节说明：通过这个教学环节让学生完成了本单元的写作练习，同时锻炼了学生的写作能力。

Step 3　完成教材Self Check的任务

 1.认真阅读Shelf Check 1中的句子，然后用must, might和can"t完成填空，完成后小组内互相交流写的答案。(4分钟)

2．认真读Shelf Check 2中的例句，根据表格中的内容提示写出表示推测的句子，完成后小组内互相交流答案。(3分钟)

环节说明：通过这个环节让学生熟练掌握了情态动词的用法。

Step 4　问题探究

(　)1.—Whose book is this?

—It ________ your brother"s.Look！His name is on the book.

A．must　　　　　　　　B．can"t

C．mustn"t be  D．must be

答案选择D，本句子是考查情态动词表示猜测的用法。从句子的意思和后面句子的情景可以判断是把握性很大的肯定猜测，所以用情态动词must be表示“一定是”的意思。