新沪教版英语七上unit3the Earth精讲与专练习

Unit3 the Earth 一.要点短语:

1．be covered by…由……覆盖2．protect the Earth保护地球3．many different plants

许多不同的植物4．some…some…一些…一些…5．on Earth在地球上

6．on the land在陆地上

7．in the sky在空中

8．under the water 在水下面9．provide sb with sth=provide sth for sb 给某人提供某物

10．make energy 制造能源

11．put …into 把……放进12．under the ground 在地下13．stop doing sth停止做某事14．It is +adj.for sb to sth

对某人来说做某事很…

15．let sb do sth让某人做某事16．one quarter 四分之一，一刻钟17．ask sb to do sth让某人做某事18．catch fish抓鱼

19．fewer and fewer越来越少20．each year每年

21．throw away 扔掉

22．need sth to do sth 需要某物来做某事23．keep sb alive 保持某人存活24．find out 查清楚,弄明白

25．a long time ago = long , long ago 很久以前

26．in the end 最后，终于

二.要点解释:

1. Read a poster about the Earth.阅读有关地球的宣传海报。

Earth n.意为“地球”，其前面需要定冠词the。eg：The moon goes round the Earth.

还有“陆地，地面；泥，土”的意思，此时不需要大写。eg：The balloon fell to earth.

on Earth= on (the) earth, 意为“在地球上”。eg：We live on Earth. 我们生活在地球上。

2.Talk about what we can do to protect the Earth. 讨论为保护地球我们能做些什么。

protect v. 保护protection n.保护

protect sb./sth. from/against sth保护某人/某物免受…伤害

We must protect the forest from fire. 我们必须保护森林免受火灾。

3.About 70% of the Earth is covered by water. 百分之七十的地球是被水所覆盖.

百分数做主语时，谓语动词要与它所指代的名词相一致.

About 60% of the students in our class are girls. 我们班60%的学生是女孩。

be covered by 被…覆盖着，表动作；The road is covered by leaves in autumn. 秋天这条路盖满了树叶。

4.There are also many people like you and me on Earth.地球上还有很多像你我一样的人。

(1)区分also; too; either

also常用于肯定句中，位于实义动词前，或用于be 动词、情态动词之后；

He also enjoys reading. 他也喜欢阅读He is also clever. 他也很聪明．

too通常用于肯定句末, 其前有逗号.I really like this song, and I like the first one ,too.

either用于否定句末, 其前有逗号I don’t like singing. She doesn’t like singing, either.

(2)like v.喜欢like doing sth喜欢做某事

本句中like是介词，意为＂像……一样＂That’s not right. Do it like this. 那样不对，像这样做才对。

5.The Earth provides us with air, water and food. 地球为我们提供了空气、水少食物。

provide及物动词，意为“提供”，provide sb. with sth.= provide sth. for sb. 为某人提供某物.

The sun provides us with light and heat.= The sun provides light and heat for us. 太阳给我们提供光和热。

6.Today, there is a lot of pollution. 今天，有很多污染。

pollution不可数名词，意为“污染”。air pollution 空气污染noise pollution 噪声污染

There is a lot of pollution in the air here. 这里的空气有大量的污染。

pollute及物动词，意为“污染；弄脏”

The dirty water from the factory pollutes the river. 来自工厂的脏水污染了这条河。

7.We burn things to make energy.我们燃烧一些东西来制造能量.

burn及物动词，= set .....on fire意为“燃烧；点燃”.

energy不可数名词，意为“能量；能源”make energy“制造能量；获取能量”

She burns all her books. 她把书全烧了。

It is important to save energy. 节省能源十分重要。

Now, people use water, the wind and the sun to make energy. 如今，人们利用水、风和太阳来获取能量。

8.We put our rubbish into the sea and under the ground. 我们把垃圾倒入海洋、埋入地下。

put…into 把…放入…；把…倒入…They put the waste water into the river. 他们把废水倒入河中。

Please put all your toys into the box. 请把你所有的玩具都放入这个箱子里。

拓展】和put有关的短语：put up 举起；张贴put off 推迟；推延put away 把……收拾好put down 放下；写下；记下put on 穿上put out 熄灭；扑灭

9.We must stop doing these things. 我们必须停止做这件事。

stop doing sth 意为“停止做某事”，即停下手头正在做的事情。

It’s time for class.Stop talking. 到上课时间了，不要说话了。

区分：stop doing sth 停止手头正在做的事情

stop to do sth 停下手头的事情，去做另一件事情（停下来去做.......）

We stopped to talk when we met in the street. 当我们在街上碰见时，我们停下来说话。

We are all tired. Let’s stop to have a rest. 我们都累了，停下来休息一会儿吧。

10.It is important for us to protect the Earth for our future. 对我们来说，为未来而保护地球是重要的。

It is+ 形容词adj.+for sb. +动词不定式短语to do sth 对某人来说做某事是…

It is important for us to learn English.对我们来说学英语很重要。

It’s very useful for us to learn English well. 对我们来说学好英语很有用。

It is good for me to eat more vegetables.多吃蔬菜对我而言是有好处的。

以上句型中，有时也可将for sb.省去，即It is +adj.+ to do sth.做某事是…样的

习题练习

一.同义词

( ) 1. The water in the river is very dirty and it kills lots of fish in it．

A.makes...clean B. makes...healthy C. makes...interesting D. makes (i)

( ) 2. We should protect the Earth from now on, or we'll be in danger.

A. keep…safe

B. keep…dirty

C. keep…fresh

D. keep…beautiful

( ) 3.The cars give out lots of bad gases (气体) and they pollute the air.

A. make…clean

B. make…fresh

C. make…new

D. make…dirty