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上教新版七年级英语U3讲解及练习

发布时间:2013-10-01 18:32:56  

Unit 3 The Earth

高频词 Earth, report, part, pattern, protect, land, field, large, provide, pollution, burn, energy, into, ground, kill, must, important, fact, own, catch, few, away, problem

词组 provide…with…, put into, throw away, set…on fire, make … clean, make ….do, keep…safe

句型 1. There is a lot of pollution.

2. There are many different plants.

3. What things are there on Earth?

4. It is important for us to protect the Earth for our future.

5. Some places are very hot and some are very cold.

6. The Earth provides us with air, water, and food.

7. What is the weather like in different places on Earth?

语法 1. 可数名词与不可数名词的用法。

2. 句型 “ there is/ are …..” 的用法。

交际用语 1. You are right. 2. That is a good idea! 3. What else can we do?

写作目标 学会写保护地球的报告。

Reading 难点精讲

1. What things are there on Earth? 地球上有什么?

1)are there……?“有、、、吗?”用于询问某地是否有某人或某物,后接复数名词。一般疑问句通常用 Are there any +复数名词表达。如:

Are there any apples in the fridge?

Are there any students in the classroom?

2)本句是特殊疑问句,特殊疑问句的结构是:特殊疑问句+ 一般疑问句。如:

What are there in your school- bag?

2. Some places are very hot, and some are very cold. 一些地方非常热,而一些地方非常冷。

Some…, some…“一些、、、、,一些、、、”。如:

Some students are singing and some are dancing.

Some flowers are red and some are pink.

3. There are many different plants. 有许多不同的植物。

Today, there is a lot of pollution.如今,有大量的污染。

There is/ are ….“有、、、“,表示某地有某人或某物。后接单数名词时用 “there is a/an…” 表示,后接复数名词时用 “there are….” 表示,后接不可数名词时用 “there is some/ much…..”等表示。如:

There is a computer on the desk.

There are some birds in the tree.

There is some water in the bottle.

4. Some live on the land. 有些住在陆地上。

On the land “在陆地上“。如:

What is the biggest animal on the land?

Many animals live on the land.

5. Some fly in the sky.有些(动物)在空中飞翔。

In the sky “在天空中”。 如:

The planes are flying in the sky.

The kites are flying high in the sky.

6. The Earth provides us with air, water and food. 地球为我们人类提供空气、水和食物。 1

Provide sb with sth “为某人提供某物”。如:

The sun provides us with energy.

What provides the trees with water? 什么为树木提供水分?

7. We burn things to make energy. 我们燃烧东西产生能量。

Make energy“产生能量”。如:

Hot things can make energy.

Can people use water to make energy?

8. We put our rubbish into the sea and under the ground. 我们把垃圾倒入海里和(埋在)地下。

Put …into….“把、、、、倒入、、、、”。如:

She puts the water into the bottles.

Please put the milk into the glass.

9. We must stop doing these things.

Stop doing sth “停止做某事”。表示停止正在做的事。如:

She stopped reading and had a rest.

He stopped running at the end of the road.

注:stop to do sth“停止(正在做的事),而去做另一件事。”如:

He worked for three hours then stopped to eat his lunch.

The bus stopped to put down the passengers.

10. It is important for us to protect the Earth for our future. 对我们来说,为了我们的将来保护地

球是重要的。

It is + adj. +for sb + to do sth “对某人来说做某事是如何的”。如:

It is important for students to study hard.

It is interesting for children to watch the animal show.

11. We must not let it pollute the river. 我们必须禁止让它(脏水)污染河流。

1)must not do……. “禁止做…., 不准做……..”, 可缩略为Mustn’t do……。如:

You mustn’t smoke in the school.

We mustn’t put the rubbish into the river.

2) let….do…..“让、、、、做、、、、”,let后的动词用原形。如:

Let him go.

Let us have a look.

12. What is the weather like in different places on Earth? 地球上不同地方的天气如何?

What is the weather like……? “….天气怎么样?” 询问天气用语。如:

What is the weather like today?

What is the weather like in Guangzhou?

随堂检测

一、选择最佳答案填空。

1. There _______ some meat in the fridge.

A. is B. are C. be D. have

2. There ______ some apples in the basket.

A. have B. has C. is D. are

3. Do you see the biggest animal _______ the land?

A. in B. on C. under D. of

4. We ______ pollute our Earth.

A. can’t B. may not C. don’t have to D. mustn’t

5. He stopped ________ and went out for a walk.

A. read B. reads C. reading D. to read

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二、根据中文意思完成句子。

1.树木为我们提供木材和食物。

Trees ______ us _______ wood and food.

2.你们家乡的天气怎样?

______ ________ the weather _______ in your hometown?

3.他把一些热水倒入茶杯里。

He ______ some hot water ______ the cup.

4.人们用风力产生能量。

People use wind to ______ ________.

5.对我们来说上课认真听老师讲课是重要的。

It is ________ for us _______ _______ _______ our teachers carefully in class.

Listening 难点精讲

1. …., you need to catch the important words.

2. They can help you find the correct answers to the questions.

随堂检测

一、选择最佳答案填空。

1. We need ______ the flowers in the garden now.

A. water B. waters C. to water D. watering

2. Did you help your mother _______ the clothes yesterday?

A. wash B. washes C. washing D. washed

3. Here is the answer ______ the maths problem.

A. of B. to C. on D. at

二、根据中文意思完成句子。

1. 你能帮我把作业本拿到老师办公室吗?

Can you ______ me ______ the exercise-books to the teachers’ office?

2. 我需要买一本新字典。

I ______ ________ _______ a new dictionary.

3. 你想要那些问题的答案吗?

Do you want ______ ________ ________ the questions?

Grammar 难点精讲

1. 可数名词与不可数名词

1)可数名词

可用单数或复数来表达数的概念的名词叫作可数名词。可数名词可与具体数词连用,也

2)不可数名词

不可数名词一般只有单数形式,没有复数形式,不可数名词在表示数量关系时,可以借助表示数量单位的短语来修饰。如:

A cup of tea a piece of news two pieces of paper three glasses of water five bags of rice

2. There is ….和 There are…的用法

“there be….”句型表示“某处有某人或某物”,结构为There be + 名词+ 地点状语。

(1) 肯定句:there is/ are + 名词+ 地点状语。当名词为单数名词或不可数名词时,用there is; 当名词为复数名词时,用there are。如:

There is a pencil in my pencil-case.

There are two books beside the pencil-case.

There is some water in the glass.

(2)否定句:there isn’t a/any + 名词+ 地点状语, 或there aren’t any + 名词+ 地点状语. 如:

There isn’t a pencil in my pencil-case.

There are any books beside the pencil-case.

There is any water in the glass.

(3)一般疑问句:is there a/any + 名词+ 地点状语, 或 are there any + 名词+ 地点状语. 回答要使用yes或no. 如:

Is there a pencil in my pencil-case.

Yes, there is./ No, there isn’t.

Are there any books beside the pencil-case.

Yes, there are./ No, there aren’t.

Is there any water in the glass.

Yes, there is./ No, there isn’t.

注意:(1)“there be….”句型中be的动词形式要和其后的名词在人称和数量上保持一致。如果有两个或两个以上的名词,be动词要和最靠近它的那个名词在数量上保持一致。如: There is a pen and two books on the desk.

There are two books and a pen on the desk.

(2) “there be…..” 句型有各种时态的变化。如:

一般过去时:there was/ were + 名词+ 地点状语.

一般将来时:There will be + 名词+ 地点状语.

随堂检测:

一、选择最佳答案填空。

( ) 1. ---What do you usually have for breakfast?

--- ________ and a cup of coffee.

A. Three bread B. three breads

C. Three pieces of bread D. Three piece of breads

( ) 2. There are two ______ and three _______ on the table.

4

A. knife; forks B. knifes; fork C. knives, forks D. knives; forks

( ) 3. The ____ are going to fly to Beijing.

A. Germen B. Germany C. Germanys D. Germans

( ) 4. They don’t have _____ to do today.

A. much homework B. many homeworks

C. many homework D. much homeworks

( ) 5. Sheep _______ white and milk _______ also white.

A. is; are B. are; is C. is; is D. are; are

( ) 6. Look! There _____ a book and two pens on the desk.

A. is B. are C. has D. have

( ) 7. There _______ some old people taking a walk in the park.

A. is B. are C. has D. have

( ) 8. --- How many students ____ in your class?

A. is there B. are there C. there is D. there are

( ) 9. --- What did you do on May Day?

--- I went shopping with my family. There _________ so many people in the street.

A. was B. are C. were D. is

( ) 10. _______ will be a welcome party next week for new students. Will you come with me?

A. It B. There C. They D. We

Speaking & Writing 难点精讲

1. He took a look at the cook. 他看了厨师一眼。

Take a look at …..“看一眼、、、、、、”. 如:

May I take it look at your photos?

I want to take a look at his new book.

注:take a look at….与 have a look at….同义,可互换。如:

Let me have/ take a look at your new dress.

2. I asked my father for a banana.我向爸爸要了一只香蕉。

Ask sb for sth “向某人要某物”。如:

I asked my mother for a shopping bag.

What did you ask your father for?

3. People catch a lot of fish every day.人们每天捉许多鱼。

A lot of “许多”,可以修饰可数名词与不可数名词,常用于肯定句。如:

I asked him a lot of questions.

There is a lot of snow on the road.

4. There are fewer and fewer fish in the sea each year.每年海里的鱼越来越少了。

1) fewer and fewer “越来越少”,两个相同的比较级重叠使用表示“越来越少、、、”。如:

He grows taller and taller.

It is getting cooler and cooler.

2) Few“少数,很少”,用于复数可数名词前,表示否定概念。如:

There are few apples in the fridge.

He has few friends in his class.

注:表示肯定概念用a few“一些”, a few 相当some。如:

There are a few chairs in his class.

5. People throw away a lot of rubbish every day.人们每天扔掉大量的垃圾。

Throw away “扔掉”. Throw away sth “扔掉某物” 也可以用throw sth away 表示。但sth 为人称代词时,sth 只能位于throw和away 之间。如:

5

Please throw it away.

What did you throw away just now?

随堂检测

一、选择最佳答案填空。

( ) 1. We wanted to have a look ______ the new pictures.

A. for B. at C. after C. like

( ) 2. He usually asks his grandmother _______ sweets.

A. for B. with C. of D. from

( ) 3. There _______ few students in the classroom now.

A. was B. were C. are D. is

( ) 4. He didn’t like the old rubber. He _______ yesterday.

A. threw away it B. threw away them C. threw them away D. threw it away

( ) 5. He is badly ill. He eats ________.

A. little and little B. small and small C. less and less D. smaller and smaller

二、根据中文意思完成句子。

1. 让我们向老师要那些问题的答案吧。

Let us ________ the teacher _______ the answers to the questions.

2. 你是否要先看菜单?

Would you like to ______ ________ _________ ______ the menu?

3. 别把那些大纸箱扔掉。

Don’t ________ the big paper boxes _________.

4. 雨越下越大。

It is raining __________ _________ __________.

5. 这只大象每天喝许多水。

The elephant drinks _______ _______ _______ water every day.

More practice 难点精讲

1. Air has no smell. 空气没有气味。

Have no “没有”,no = not any。如:

There is no water in the bottle. = There is not any water in the bottle.

I have no apples. = I have not any apples.

2. Look at a kite, or a plane in the air. 看看空中的风筝或飞机。

In the air “在空中”。 如:

There is a plane flying in the air.

The children looked up at the kites in the air.

注:此处in the air与in the sky 同义, 通常可以互换,但二者有区别。

In the air指在离地球较近的“天空”,而 in the sky指在离地球较远的“天空”。如:

A bird is flying in the air.

There is no cloud in the sky.

3. They ride on air. 他们漂浮于空气中。

On air “在空气中”。如:

I dreamed I rode on air and couldn’t fall last night.

I was so exciting, just like floating on air.

注:on the air“在广播中”。如:

There will be a story on the air this evening.

4. And lift people up. 并把人升起来。

Lift sth up “把、、、升起、把、、、、举起”. 可以用lift up sth表示,如果sth为人称代词 6

时,只能用lift sth up 表示。如:

Can you lift up the big stone?

The boxes are too heavy. I can’t lift them up.

5. We need air to survive.我们生存需要空气。如:

Need sth to do ….“需要某物来做某事”。

Plants need sunshine to survive.

People need plants and animals to provide food.

6. It keeps us alive. 它(空气)使我们活着。

Keep sb + adj “是某人保持某种状态”。如:

The noise kept me awake.

What keeps you angry?

随堂检测

一、选择最佳答案填空。

( ) 1. He wished he could ride ________.

A. on the air B. on air C. in the air D. in air

( ) 2. The air lift the balloon __________.

A. in B. on C. up D. over

( ) 3. There is _______ air or water on the moon.

A. not B. no C. any D. some

( ) 4. The little boy needs some colour pencils ________.

A. draw B. drew C. drawing D. to draw

二、根据中文意思完成句子。

1. 水是无色的。

Water ______ _______ colours.

2. 男孩看着他的气球飞向天气。

The boy is looking at his balloon flying ______ _______ ________.

3. 你能替我把那个箱子搬到架子上吗?

Can you ______ that box _______ onto the shelf for me?

4. 你需要暖和的衣服来御寒。

You ______ ______ _______ ______ protect you against the cold. 7

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