Unit7单元知识点总结人教版八年级英语下册

人教版八年级英语下册第七单元各知识点归纳总结
Unit7 What's the highest mountain in the world？世界最高的山峰是哪一座?
一、重点词组
1. as big as... ......一样大
2. one of the oldest countries最古老的国家之一
3. feel free to do sth.随意地做某事
4. as far as I know据我所知
5. manmade objects人造物体
6. part of... ....的组成部分
7. the highest mountain最高的山脉 8. in the world在世界上
9. any other mountain其他任何一座山10. of all the salt lakes在所有的咸水湖中
11. run along跨越. 12. freezing weather冰冻的天气
13. take in air 呼吸空气，14. take in吸入;吞入(体内)
15. in the face of difficulties面对困难 16. give up doing sth.放弃做某事
17. achieve one’s dream实现某人的梦想18. the forces of nature自然界的力量
19. reach the top到达顶峰20. even though虽然;尽管
21.at birth出生时22. be awake醒着23. run over with excitement兴奋地跑过去
24. walk into sb.撞到某人25. fall over摔倒26. the first person to do sth.第一个做某事的人27. every two years每两年28. cut down the forests 砍伐林木
29. endangered animals濒危动物30. fewer and fewer pandas大熊猫越来越少
31. be in danger处于危险之中32. the importance of saving these animals拯救这些动物的重要性
二、重点句型
1. It is +adj. + (for sb. )to do sth. 做某事.....
It is also very hard to take in air as you get near the top.当你接近山顶时,连呼吸都会困难。

2. ... is because ... ....是因为.....
One of the main reasons is because people want to challenge themselves in the face of difficulties. 其中的一个主要的原因是人们想在面临困难时挑战自己。

3.How high/ deep/... is... ? ....多高深?
How high is Qomolangma?珠穆朗玛峰有多高?
5.sb. spend time/money doing sth. 某人花时间/钱做...
Adult pandas spend more than 12 hours a day eating about 10 kilos of bamboo.
成年大熊猫一天要花12个多小时的时间吃大约10公斤竹子。

三、语法点
形容词副词的原级、比较级和最高级
(一)原级句型:
1.A is as+原级+as+ B 表示A与B一样,,eg: He is as tall as me.
2.A is not as/so +原级+ as B 表示A不如B.,eg:He is not as tall as me.
(二)比较级句型
可以修饰比较级的词，much, a lot, far, ...的多；a little, a bit, ...点儿；even 甚至；still 仍然
Eg. Lesson One is much easier than Lesson Two.第课比第二课容易得多。

Tom looks even younger than before. 汤姆甚至比以前更年轻。

1.当句中有than时则用比较级。

eg: He is fatter than me.
2.当句子中的比较对象为两者时用比较级:“特殊疑问词+be+形容词比较级，A or B?”
eg: Which is bigger, the earth or the moon?哪一个大，地球还是月球?
3.“比较级+and+比较级”表示“越来越”。

eg.Our grandfather is bigger and bigger.祖父越来越老了。

加more构成比较级的形容词则用more and more+形容词表示越来越,,
eg: English is more and more important.
4.“the+比较级，the+比较级”表示“越,，.越.”。

Eg. The more careful you are, the fewer mistakes you'll make.你越小心，犯错就越少。

5.“A+be+the+形容词比较级+of the tw+...,'表示“A是两者中...的”。

Eg.Look at the two boys. My brother is the taller of the two.
6.A+be+形容词比较级+than+any other+ 单数名词(+介词短语)”表示“A比同一范围的任何一个人/物都.”，Eg. The Yangtze River is longer than any other river in China.
=The Yangtze River is the longest river in China.
(三)最高级常用句型结构
1.“主语+be+the+形容词最高级+单数名词+in/of短语”表示..，.,...中最...的”。

eg: Tom is the tallest in his class./of all the students.
This apple is the biggest of the five.
2.“主语+be+one of the+形容词最高级+复数名词+in/of短语”表示......中最...之一”。

Eg: Beijing is one of the largest cities in China.
3.“特殊疑问词+be+the+最高级+A, B, or C?”用于三者以上
eg Which is the biggest? The moon.the sun, e the earth?
4.*the +序数词+最高级+单数名词+范围”。

表示......是第几最。

eg: The Yellow River is the second longest river in China .
[注意]形容词最高级之前要加the, 但当最高级之前有形容词性物主代词或名词所有格时则不用加the
eg: He is the best student in my class. He is my best friend.
(四)形容词副词的规则与不规则变化
规则变化
1. 般在词尾直接加er或est，例如，talltallertallest， longlongerlongest
2.以不发音的字母e结尾的单词在词尾直接加r或st,例如, nicenicernicest
3.以辅音字母+y 结尾的词，把y变为i，再加er或est, 例如, heavyheavierheaviest
4.重读闭音节，末尾只有一个辅音字母，双写这个辅音字母，再加er或est,
eg. bigbiggerbiggest
5.双音节词和多音节词分别在原级前加more构成比较级和most构成最高级，例如,
slowlymore slowlymost slowly; beautiful more beautifulmost beautiful
不规则变化。