内容正文:
课 题
Revision lesson
教学目标
会有情态动词
教学重点及难点
会灵活运用情态动词
教学过程
教学流程
教师活动
学生活动
Step1 Listening
The students listen and do Activity 1
Step2 Reading
The students read Activity 3 and fill in the form in Activity 5.
Step3. Answer the questions
The students ask and answer in pairs and then show the answers to the class.
情态动词
一.情态动词的用法
1. can 用法
1)表示能力,与be able to同义,但can只用于现在时和过去时,be able to可用于各种时态。
Two eyes can see more than one.
注:Can you … ? Yes, I can / No,I can’t.
2).表示允许、请求
用could比can 语气更加委婉客气,常用于could I /you …..?句型中,若表示同意时,用can回答而不用could .
Could I borrow the book ? No, you can’t .
3)。表示推测 “可能”常用于否定句或疑问句中。(can’t表示一定不是)
It can’t be true .
Can it be true ?
2. may 用法
1)表允许,请求= can
表示许可或征求对方的许可,常于第一人称连用。
注:May I ….? Yes ,you may No, you can’t / mustn’t .
在回答以may引起的问句时,多避免用这个词,而用其它方式,如Yes, please. / Certainly.
2)表推测,可能、也许。常用于肯定句中。
Maybe he knows the news .=
He _____ _____ the news.
3. must
1)表示义务。意为“必须”(主观意志)。
We must do everything step by step.
注:Must I ….? Yes, you must / No,you needn’t(don’t have to ).
--Must we hand in our exercise—books now?
--No, you needn’t. / No, you don’t have to.
2)mustn’t 表禁止、不允许。
You mustn’t talk to her like that.
3)表示揣测。意为“想必、准是、一定”等,只用于肯定句。否定、疑问句中must改为can .
He must be ill. He looks so pale.
She’s wearing a diamond necklace. She must have a lot of money.
注:must表推测时,其反义疑问句与must后面的动词一致。
There must be something wrong ,____ ____?
4.need的用法
need既可用作情态动词,也可用作实义动词。用作情态动词时,主要否定句或疑问句中。用作实义动词时,可用于各种句式。
1).用作情态动词,用于否定句和疑问句中。
a).Need I ….? Yes , you must / No, you needn’t .
Need we finish the work today ?Yes you __?
A.need B.can C. may D.must
b).need + do sth . 变否定句:needn’t do sth
变疑问句:Need sb do sth ?
2).用作实义动词
a).need + to do sth . We need _______(buy) some school things .
变否定句:don’t /doesn’t /didn’t +need to do sth .
变疑问句:Do / Does /Did sb + need to sth ?
Yes , … do/ does / did No, sb don’t / doesn’t /didn’t .
You don’t need to do it yourself.
b).当主语是物时。Sth + need + doing sth = Sth