《Language in use》Animals in danger PPT课件3

Revision

Please say a sentence about each animal.

1 Match the two parts of the sentences.

1) They let the elephants ...

2) We want the animals ...

3) We should not allow the situation ...

4) Help us ...

5) They came here ...

a) ... to help.

b) ... to become dangerous.

c) ... plant more bamboo.

d) ... live in the nature park.

e) .... to be safe

... ... ...

Grammar

动词不定式

当我们要表示“想做某事、需要做某事或决定做某事”时，就会出现两个动词连用的情况，这时应如何表达呢？

同学们自然会想到want to do sth.,need to do sth.和decide to do sth.等表达方式。

1. 什么是动词不定式？

主要行为动词后面的动词都采用了“to+动词原形”的结构，我们把这种结构称为动词不定式（有时可以不带to）。动词不定式没有人称和数的变化，在句子中不能作谓语。下面我们一起来看一下动词不定式有哪些语法功能。

2. 动词不定式的语法功能：

1. 不定式作主语

不定式作主语时，常用it作形式主语，而将作主语的不定式放在句子后部。

It is good to help others.

帮助他人是件好事。 

It is exciting to surf the Internet.

上网是件令人兴奋的事。 

2. 不定式作宾语 

学习不定式作宾语时,要注意掌握:后接不定式作宾语的动词。常见动词有: want, 

hope, wish, like, begin, try, need, forget, agree, help 等。

Many people decide not to think about it. 

许多人决定不去想这件事。 

I want to go to the library.

我想去图书馆。 

... ... ...

Work in groups. Find out about the animal. Find these things: (Activity 10)

1. where it lives

2. what the problem is

3. how many there were before and how many there are now

4. what you or the government can do about it

Write one or two short paragraphs about it.

... ... ...

Practice

一、单项选择。

1. Would you please tell me_____next?　　　　　

A. how do      B. what to do

C. what do I do     D. how I should do 

2. The girl wasn’t_______to lift that  bookcase.

A. too strong　B. enough strong

C. strong enough   D. so strong 

3. For a time his grandmother found ______ accept his new idea.

A. hard         B. it hard 

C. it hard to    D. hard to 

4. As she has never been there before, I’ll  have someone _____ her the way.

A. show     B. to show 

C. showing     D. showed 

5. You _____ drive slowly. The roads are wet.

A. had rather　 B. would rather

C. had better　 D. would better 

... ... ...

二、用所给动词的适当形式填空。

1. Do you know when ________ (have) a   picnic?

2. She is very busy today. She has a lot  of  work _____ (do).

3. Our teacher asked us _____(be) careful when we crossed the road.

4. It’s easy for us _________ (answer)   the question.

三、汉译英。 

1. 我们需要更好地保护它们。

We need to protect them better.

2. 许多动物没地方住。

Many animals have no place to live.

3. 我们究竟能做什么？

What on earth can we do?

4. 现在有许多濒危动物。

Now there’re many animals in danger.

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