英语必修3外研版Module4第4课时教案
Period 4 Grammar 1, Grammar 2
课题
Period 4 Grammar
课型
New
教学
目标
To enable Ss to know about the active voice and passive voice of the infinitive;
To enable Ss to know about three tenses of the infinitive;
To enable Ss to know about a special use of the Infinitive: but + do
重点
1. about three tenses of the infinitive;
2. about a special use of the Infinitive: but + do
难点
1.How to use passive voice of the infinitive
2.How to use the Infinitive: but + do
学情分析
The Ss can finish the task.
教具课件
1. A recorder 2. A projector 3. A computer
教法
explaining and practicing
教学程序
教学内容
师生
活动
时间分配
Step 1
Step 2
Step3
Step4
Step 1. Revision
Check the answers to the Vocabulary Exercises in the Workbook.
Step 2. Grammar 1
1. Ask Ss to divide the examples in Activity 1 on page 34 into two groups. The sentences in group one use the active voice and those in the other group use the passive voice.
Suggested Answers:
Group one:
(a) The wind is strong enough to move sand dunes.
(b) We were advised not to go outside.
(c) It’s frightening to be cycling to work in a sandstorms.
(d) I am the only person in my family to have been in a sandstorm.
Group two:
(e) There’s nothing to be done.
(f) To have been caught in a sandstorm was a terrible experience.
2. Ask Ss to observe the various forms of the infinitive and find the rules of the formation.
3. Rewrite the sentences using infinitive structures in Activity 2.
4. Ask Ss to put the verbs in brackets into the correct infinitive forms in Activity 3 on P34.
5. Ask Ss to discuss and make the following conclusion.
形式
时态概念
语态
to do
与主动词同时发生或发生在主动词之后
主动
to be doing
主动词发生时，不定式动作正在进行。
主动
to have done
发生在主动词之前
主动
to be done
与主动词同时发生或发生在主动词之后
被动
to have been done
发生在主动词之前
被动
6. Ask Ss to translate the following sentences
妈妈警告我不要独自到河里游泳，因为太危险了。
我不想被别人看到穿这么糟糕的衣服。
不用假装在睡觉，我知道你醒着呢。
你似乎已经知道这个消息了，我就不必再告诉你了。
Suggested Answers:
My mother warned me not to swim in the river alone because it’s dangerous.
I don’t want to be seen in such an awful dress.
Don’t pretend to be sleeping. I know you are awake.
You seem to have known the news. I don’t need to tell you that.
Step 3. Grammar 2
1. Ask Ss to read the sentences in Activity 1 on page 36 and discuss the questions in pairs.
2. Ask Ss to finish Activity 2 on P36.
3. Ask Ss to discuss the correct sentences in Activity 2 on page 36 and let them find the rules of the infinitive without “to”.
For your reference:
常见的关于不带“to”的不定式的用法如下:
cannot but; cannot choose but 与cannot help but 之后的不定式一般都不带to,常翻译成“不得不”。
在连词but之前如有动词do,其后的不定式不用to, 即: do nothing but do, 译为“只……”,但如果but之前的动词不是do,其后的不定式一般不带to.
4. Ask Ss to translate the sentences into English.
那件事事关重大,我只好请警察来。
听到这个消息,他忍不住哭了起来。
我们不得不拒绝他的建议。
我不得不承认他对了,我错了。
Suggested answers：
The matter was so serious that I did nothing but call in the police.
Hearing the news, he cannot help but cry.
We cannot choose but refuse his proposal.
I could not but admit that he was right and I was wrong.
Step 4. Homework
1. Ask Ss to review Grammar1 and Grammar2.
2. Ask Ss to finish the Grammar exercises in Workbook on P85-86
10’
34’
1’
板
书
Period 4 Grammar
形式
时态概念
语态
to do
与主动词同时发生或发生在主动词之后
主动
to be doing
主动词发生时，不定式动作正在进行。
主动
to have done
发生在主动词之前
主动
to be done
与主动词同时发生或发生在主动词之后
被动
to have been done
发生在主动词之前
被动
教学后记
The Ss have some difficulties in understanding the infinitive.
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