初中英语人教新目标 (Go for it) 版八年级下册Unit 7 What’s the highest mountain in the world?Section B学案及答案

Unit 7 What’s the highest mountain in the world?

Section B & Self Check

教材知识全解 讲透知识 查漏补缺

知识点一 die from的用法

教材原文The babies often die from illnesses and do not live very long.那些幼崽经常死于疾病,活不了太长时间.

本句中的die from是固定搭配,意为“死于”.

The old man died from/of colon cancer.这位老人死于结肠癌.

辨析

若死因是环境影响到体内,即两方面共有的原因,则用of或from均可.如:die of/from a drink/a wound/overwork/starvation/hunger and cold死于饮酒／受伤／劳累过度／饥饿／饥寒.但是在实际运用中,两者混用的情况较多.

例1-Some of the animals__________ the pollution.

-Right. The government will find ways to solve the problem.

解析 若死因存在于人体之上或之内(主要指疾病、衰老等自身的原因),一般用介词of;若死因不存在于人体之内或之上,而是由环境造成的(主要指事故等方面的外部原因),一般用介词from,故选D.

答案 D

知识点二 cut down的用法

教材原文 Many years ago, there were a lot more bamboo forests and pandas in China, but then humans started to cut down these forests.许多年前,中国有更多的竹林和熊猫,但是后来人类开始砍伐这些竹林.

cut down是固定搭配,在此处意为“砍伐;砍倒”.cut down还可以表示“减少;缩短”.

They are cutting down the trees.他们正在砍伐树木.

Seven trees have been cut down.七棵树已经被砍倒了.

拓展“动词＋down”的短语小结:

look down 向下看

cut down 砍伐

turn down关小;调低

lie down 躺下

pull down 拆毁

write down写下

break down出故障

put down 放下:写下

例2 (2020安徽阜阳太和三校联考)-Do not__________ the big tree that gives you shade.

-Er, I agree with you.

解析句意:-不要砍了那棵能给你遮阴的大树.-嗯,我同意你的说法.turn down“关小”;cut down“砍倒;减少”;take down“拆除”;sit down“坐下”.由句意可知B项符合题意.

答案 B

重点难点全解 精讲精解 精准高效

如何表达较大的数字概念

本单元侧重讲“千位数及以上的数字概念”.具体如下:

从数字的右端向左端数,每三位数加一个千分撇“,”.从右开始,第一个“,”前的数字后添加thousand;第二个“,”前面的数字后添加million;第三个“,”前的数字后添加billion.然后一节一节分别表示,两个逗号之间最大的数为百位数形式.

2,648 two thousand six hundred and forty-eight

16,250,064 sixteen million two hundred and fifty thousand sixty-four

5,237,166,234 five billion two hundred and thirty-seven million one hundred and sixty-six thousand two hundred and thirty-four

单元语法全解 熟患句型 把握要领

形容词、副词的比较级和最高级

英语中,在两者之间进行比较时,要用比较级;在三者或三者以上的人或物之间进行比较时,要用最高级.关于比较级和最高级的构成和句式如下:

1.比较级和最高级的构成

(1)规则变化

(2)不规则变化

一些形容词和副词的比较级和最高级是不规则变化.常见的此类词有:

记忆口诀“坏”“病”两“多”和两“好”.一是“远”来二是“老”.little是“少”不是“小”.

2.和比较级有关的句式

Our house is smaller than yours, but I think the garden is bigger.

我们的房子比你们的小,但我认为花园比较大.

The busier he is, the happier he feels.他越忙,就越开心.

It's getting warmer and warmer.天气正变得越来越暖和.

Who is taller, Lisa or her sister?谁更高,莉萨还是她姐姐?

注意 如果比较级要借助more来构成,则“越来越······”要用“more and more+原级”结构.

Our city is becoming more and more beautiful.我们的城市正变得越来越美丽.

3.和最高级有关的句式

She is the most beautiful girl in her class.她是她班里最漂亮的女孩.

Shanghai is one of the biggest cities in the world.上海是世界上最大的城市之一.

Which do you like best, tea, coffee or juice?你最喜欢哪个,茶、咖啡还是果汁?

易错易混全解 对比辨析 跳出陷阱

include, including, included

Your duties will include putting the children to bed.你的职责包括让孩子们上床睡觉.

Ten members were present at the meeting, including me.10个成员出席了会议,包括我在内.

Everyone laughed, me included.每个人都笑了,包括我在内.