Unit 8 Save Our World. 语法写作课件

课件24张PPT。语法点集中攻坚单元要点大本营单元一法练写作Unit 8 Save Our World“it”的用法语法讲堂考点 1it作实词考向一可以指除人以外的一切事物，相当于汉语中的“它”，有时也指前面提到的整件事情。
eg: I had a good pen，but I lost it yesterday.
我有一支好钢笔，但昨天我丢了它。辨析：that, one与it典例—What kind of house would you like?
—I'd like ________with a garden in front of
________.(鞍山)
A．it; one　　　　　B．one; one
C．one; it 　　　　　D．it; it
【点拨】考查代词的用法。one强调个体，表示同一类事物。it表示特指，即上文提到的事物。C考向二在某些情况下，也可指人，常指性别不详的人，特指婴幼儿。
eg：—Who is it？这是谁？
—It's me.是我。
The baby smiled when it saw its mother.
这个婴儿看到它妈妈时笑了。考向三在回答What's this/that？的答语中，用it代替this或that。
—What's this/ that？这/那是什么？
—It's a computer.是台电脑。考向四常指时间、天气、距离、数学等，常不翻译出来。
eg：It's tea time. Mrs Turner goes into the kitchen.
到了喝茶的时间了，特纳夫人走进了厨房。
It is winter now. It is ten degrees below zero.
现在是冬天。气温是零下10度。
It is only half an hour's walk to the tall tower.
走路只要半小时的路程就可以到达高塔了。
It will be rainy tomorrow.
明天将会下雨。典例—What's your QQ number?
—________ is 355994127. (南宁)
A．I B．He
C．It D．She
【点拨】it指代QQ号码。C作形式主语或形式宾语考点 2考向一(1)英语中不定式、动名词、主语从句等复杂成分在作主语时主语往往显得很长，使整个句子看上去头重脚轻，这时就借助“it”来作形式上的主语，而把真正的主语移到句子后边去，使全句看上去平衡一些。 “it”没有实际的意义。
eg: It is fun for her to study, but it is difficult for
her to study and work at the same time.
对于她来说学习是有趣的，可是边工作边学习对她来说是困难的。(2)it用作形式主语的重要句型。
①It＋be＋adj.＋for(of) sb. to do sth. 某人做某事……
eg：It is hard for him to make up his mind.
对他来说下决心很难。
It was foolish of her to say that.
她说那样的话，太愚蠢了。
此句型中的介词of和for的区别是：用of时，形容词指某人的性格、特点等。如：nice，kind，silly，wise，clever，careless，rude，polite，brave等。用for时，形容词指事物的性质、特征等。如：difficult，easy，impossible，important，dangerous，fun等。②It＋ be＋ n．＋ to do sth.做某事是……
eg：It is our duty to protect the environment.
保护环境是我们的责任。
③It takes/took sb.＋时间段＋to do sth.某人做某事花了多少时间。
eg: It took me two hours to do my homework.
我做家庭作业花了两个小时。典例It is great ________ us to get so many favourite books on International Children's Book Day.(连云港)
A．to B．with
C．of D．for
【点拨】考查It is ＋形容词＋for sb. to do sth.，做某事对某人来说怎么样。用for时，形容词指事物的性质和特征。D考向二【重点】 作形式宾语
当不定式、动名词、从句等复杂成分作宾语且后面跟有宾语补足语时，通常会在宾语补足语前使用it作形式宾语，而将真正的宾语移至句末。其基本结构为“动词＋it＋宾语补足语＋不定式(动名词或从句)”，常用于这种结构的词有：think，find，make，consider，feel，believe等。
eg: I find it difficult to do the job well.
我发现做好这项工作很难。
I think it best that you should stay here.
我认为你最好呆在这里。典例互联网使得我们相互交流更加便捷。(达州)
Internet makes _____ more convenient for us to _____________ with each other.it it的用法
小小 it 神通大，既指事物又指人，神通广大当替身；
时间、距离和天气，it 表示最称心。
it 本身无意义，用来代替主或宾；
如果强调主宾状，强调句型派用场。 特色土方法communicate即学即练一、根据所给提示完成句子
1．Paul has a dog，but I don't know ________(it) name.
2．The house ________ (it) is very beautiful，but the river near
it is much polluted.
3．(改编·青岛)It is difficult for people today ______________
(imagine) what life will be like in a hundred years.
4．(中考·连云港)It ____________________(对我们是有帮助
的) to choose public transport to change traffic jams.
5．It's easy for local people _____________ (choose) various
goods in Sunnyside Shopping Mall.itsitselfto imagineis helpful for usto choose二、单项选择
6．—What's your QQ number?
—________ is 355994127.
A．The B．He C．It D．She
7．________ is really hard ________ them to climb such
a high mountain.
A．This；to B．It；to
C．This；for D．It；for
【点拨】考查固定句型“It is ＋adj.＋ for sb.to do sth.”。It是形式主语，真正主语是to do sth.，意为“做某事对某人来说怎么样。” CD8．Could you record today's NBA basketball game for
me? I can watch ________ later.
A．one B．my
C．your D．it
9．I find ________ necessary to learn about the customs
of a country before you go there.
A．that B．This C．it D．one
【点拨】考查代词辨析。句意：我发现在去一个国家之前学习那个国家的风俗习惯很有必要。此处考查句型：find it ＋ adj. ＋ to do sth.表示“发现做某事……”，其中的it是形式宾语，后面的动词不定式是真正的宾语。故选C。 CD10．—There is still a copy of the book in the library. Will
you go and borrow ________？
—No，I'd rather buy ________in the bookstore.
A．it；one B．one；one
C．one；it D．it；it
【点拨】考查代词的用法。it表示同一个事物，即上文提到的a copy of the book；one表示同一类事物中的一个。A三、按要求完成句子
11．Knocking on the door before entering a room is polite.
(改为同义句)
________ ________ ________ to knock on the door before entering a room.
12．I think that it is important to learn English well.(改为简
单句)
I think ________ ___________ to learn English well.
13．Is this your dog？(作否定回答)
___________________________________It is polite it importantNo，it isn't.14．I spent an hour writing this composition.(改为同义句)
________ took me an hour ________ ________ this composition.
15．To use paper only on one side is a waste.(改为同义句)
________ ________ a waste to use paper only on one side.Itto writeIt is返回单元要点大本营根据括号中所给的汉语提示完成短文 Do you know the environment？It's getting worse and worse. It is being ________1(污染) seriously by________2(工厂) and cars. Certainly，we produce________3(浪费) every day and it does harm to our environment. Though we are young, we can still do something to help. It's our duty __________4(保护)the environment. Here are some ideas for you to live a green life.
First, we should set up a no--car day every week. I think there are ___________5(太多的) cars in our school. Cars notpollutedfactorieswasteto protecttoo many返回only cause serious air ________6(污染) but also waste energy. On the no-car day, neither students nor teachers are ________7(允许)to drive to school. They can just walk or take a bus. It's ________8(有利于)the environment.
Second, we had better not use plastic bags any more. No one can stand the “white pollution”．So it is wise to use cloth bags which can be used ________9(再，又)．
Finally, as students, we should ________10(关闭) the lights when we leave the classroom, use both sides of the paper, and reuse our textbooks and so on.pollutionallowedgood foragainturn off单元一法练写作写作方法：三步法写环境保护类作文◆ 步骤一：引入环境
保护主题
◆ 步骤二：说明环保
原因
◆ 步骤三：如何保护
环境(中考·黔西南)由于树木被大量砍伐， 植被面积逐年减少，空气受到严重污染，臭氧层遭到严重破坏……人们已感到气温逐年升高，就在前不久，印度的高温已致1700余人死亡，对此现象，你有何看法？请以“How to protect ________？”为题，写一篇80—100词的短文，谈谈你的想法。
提示词：pollution，reuse，plant
要求：1.语句流畅，书写工整；
2．使用所给提示词，并可适当发挥；
3．文中不得出现真实的人名、地名等信息。
_________________________________________
How to protect our environment?
As a student，we should try our best to① protect our environment. Now the pollution is becoming more and more serious. Too many② buses and cars can be seen on the road，so we should go to school by bike or on foot. We should reuse water. For example，when I finish washing the clothes③，I use the water to clean the floor and water the flowers. At the same time，I never use plastic bags. And I advise my parents to plant some trees behind my house.
It's important for us to live a low-carbon life to protect the environment.④范文:
◆本文运用了“三步法”写“环境保护”类作文的写作方法：
步骤一、引入环境保护主题(第1段的第1句话)。
步骤二、说明环保原因(第1段的第2句话)。
步骤三、如何保护环境(第1段的第3句话～第一段末)。
◆本文的添彩点：
本文运用了大量的短语如①②， 同时也使用了时间状语从句如③；句型It's＋adj.＋for 名师点评：返回