广州九年级下Unit 4 Natural disasters

Unit 4 Natural disasters

用法集萃

1. start to do sth. 开始做某事

2.have to do sth. 必须/不得不做某事 3.try to do sth. 试图/尽力做某事 4.it is/was adj. to do sth. 做某事是......的 5.afford to do sth. 负担得起做某事 6.have no time to do sth. 没有时间做某事 7.it seems that +从句

8.stop doing sth. 停止做某事 9.ask sb. to do sth. 让某人做某事 10.be able to do sth. 能够做某事 11.suggest doing sth. 建议做某事

12.It takes (sb.) some time to do sth.（某人）花费多少时间做某事 13.make +宾语+形容词 使某人/某物...... 14.find sb.+doing sth. 发现某人正在做某事 15.let sb. do sth. 让某人做某事 16.adj./adv. enough to do sth 足够......可以做某事 17.had better do sth. 最好做某事 18.help sb. (to) do sth. 帮助某人做某事 19.expect sb. to do sth. 期待某人做某事 20.keep doing sth. 一直做某事 经典句型

1. It’s important to stick with it.坚持工作很重要。

2. I have no time to think about the flood.我没有时间考虑洪水。 3. It took a long time to build the house.建这座房子花了很长时间。 4. It seems that nobody is paying any attention to the flood.

似乎没有人关注那场洪水。

5. It is not a good idea to sit around and worry about the flood.

闲坐着担心洪水不是一个好主意。

重点语法

it 作形式主语的用法

代词it可以用来代替一个名词、一个短语、一个句子，在句中作主语或宾语。本单元学习it作形式主语的几种情况：

A． it 作非人称代词表示天气，日期，时间，温度，距离，价值，路程，度量，

自然现象与环境等，也可模糊地指一般情形或上文的部分或整个意思。译成汉语时，it 通常不一定译出来。

B． it 在句中作形式主语：当句中的主语是动词不定式，动名词时，往往把主语

放在谓语动词之后，而用it 放在句首，作形式主语。 1. it作主语指时间、日期、天气、距离和气温等。 It’s nine o’clock now. （指时间）

It is much colder than it was yesterday. （指天气） It is about 5 kilometres from here to my home. （指距离） It is very hot in the classroom. （指气温） It is Sunday today. （指日期）

2. It作形式主语代替动词不定式，常用于以下句型中： (1) it is/was adj. (of/for) sb. to do sth.

当表语是与事物的特征有关的形容词时，如easy, difficult, hard, important, necessary等，用介词for.

It is difficult for Lucy to learn physics. It is interesting for us to play badminton.

当表语是描述人的性格、品质的形容词时，如kind, nice, polite, clever, foolish, stupid等，用介词of. It is kind of you to help me.

It is clever of the little child to work out such a difficult math problem. (2) it takes/took sb. some time to do sth.

It takes him an hour to do his homework every day. (3) it is/was n. to do sth.

It is great fun to have a party here. It was a great pleasure to work with you.

3.it作形式主语还常用于句型 “it seems/appears that +从句”，表示 “似乎/好像/看来......”

It seems that he knows everything. It appears that we are wrong.

语法检测:

一．按照句子结构的语法性，填入一个恰当的词。 1. _________is not easy to ask her stop. 2. Look at the baby! _______ is one year old.

3. __________was on Sunday, an American friend of mine came to see me. 4. __________is a very long way from here to Shenzhen Bookstore. 5. I found __________hard to go to sleep. 6. We can’t go out because ________is raining. 二．根据括号内的提示完成下面对话。

1. --- She looks rather pale, _______ (it / seems / that / wrong / something / her / with / there is) - -- Yes, she got a cold

2. --- Did your friend catch the train at last?

--- _______ (it / appears / failed / the train / that / to catch / he) 3.--- I think we should think of a better idea to solve the problem. --- _______ (it / seems / right / that / you are) 三．将下列句子替换成用it作形式主语的句子。 1.

to

finish

the

homework

takes

a

lot

of

time

and

effort.

__________________________________________ 2.

to

face

the

situation

bravely

takes

a

great

deal

of

courage.___________________________________________________ 3.

to

complete

such

a

complex

task

is

very

difficult.________________________________________________ ________

4. to be polite and friendly to your colleagues is

important.______________________________________________________ 5.

to

go

fishing

on

weekends

sounds

like

a

good

idea.________________________________________________________

第二节 语法填空

( 1 )

Without proper planning, tourism can cause____1____.(problem) For example, too many tourists can crowd public places ___2___ are also enjoyed by the citizens of a country. If tourism create too much traffic, the citizens will become ___3___ (anger) and unhappy. They begin to dislike tourists ___4___ to treat them impolitely. They forget how much tourism can help the country’s economy. ___5___ is important to think about the people of a destination country and ___6___ tourism affects them. Tourism should help ___7___ country keep the customs and beauty that attracts tourists. Tourism should also advance the wealth and ___8___ (happy) of local citizens.

Too much tourism can be a problem. If tourism ___9___ (grow) too quickly, people must leave other jobs to work ___10___ the tourism industry. This means that other parts of the country’s economy can suffer.

Key：1. problems 2. that/which 3. angry 4. and 5. It 6. how 7. a 8.

Happiness9.grows10.in

( 2 )

London was awarded ____1____ 2012 Olympic Games on Wednesday, ___2___ (defeat) European rival Paris in the final round of voting to take the games back to British capital ___3____ the first time since 1948. ___4____ Moscow, New York and Madrid were eliminated (淘汰) in the first three rounds（回合). London beat Paris 54—50 on the fourth ballot(投票表决) of the IOC.

In London crowds cheered and waved flags as ___5____watched the announcement from Singapore ___6____ a giant screen in Trafalgar Square and in