八年级下册英语Unit7
1.deep  adj.        deeply. adv.
1）The river is two hundred deep.
2）I was deeply moved
2.desert  n.沙漠  dessert  n.甜点
Eg.He was eating dessert in the desert when the earthquake happened.
3.population  n. 人口
1）population:“人口数量”，谓语动词要用单数形式
2）询问人口数量时要用“What’s the population of ...?”提问，
3）表示人口“多”要用large或big；表示人口“少”要用small
4）询问人口数量时。前有分数、百分数修饰时，谓语动词通常用复数形式
1）The population of China is much larger than that of the USA.
2）-What is the population of your hometown？
  -The population of your hometown is about 200，000
3）Three fifths of the population here are old people.
4.Asia -- Asian              Europe -European
  America –American    Germany-German
  China –Chinese        Australia-Australian
Japan –Japanese        France-Frenchman-French
  Korea- Korean
5.tour  n./v.    tourist  n.游客
常用短语： go on a tour
1）They went on a tour round the world last year.
2）We are touring Italy for our holidays this year.
3）The tourists are from all over the world
6. protect  v. protect… from /against 保护…免受…
  protection  n. environmental protection
1）We should protect our environment.
2）He raised his arm to protect his child from hurt.
3）Little children live under the protection of their parents.
4）Everyone takes part in environmental protection.
7.achievement  n.  成就  achieve  v. 达到，完成，成功
1）I haven't achieved very much today. We try to
celebrate the achievements of our students.
2）I have achieved my dream./ My dream has come true.
8.include  v.
including  prep. 包括什么在内，后跟名词或代词。在句中作状语，用于对主句的补充说明。
Included形容词，包括在内的。一般位于名词或代词之后做后置定语
1）A good British breakfast always includes sausage.
2）Many middle school students like reading Harry Potter ,including me.
3）Everyone stood up, me included.
9. succeed  v. succeed in sth /doing sth.
  success n.  successful  adj. successfully. adv.
1）He is a success in this field. So he will meet his success this time.
2）He is a successful businessman.
3）Without their help, we could not have done it so successfully.
4）They succeed in solving the problem.
10.birth  n.不可数  at birth=when… was/were born.
1）At birth, most babies weigh  between six and eight pounds.
2）Most babies weigh between six and eight pounds when they were born.
11.up to 到达，至多有，不多于常用于数次之前表示达到某种程度或某一数量相当于as far as
1）Our football team played up to its best last night.
2）There are up to two thousand students in our school
12. 比较级和最高级的特殊句型
① “get/ become + 形容词比较级 + and + 形容词比较级 ”表示“变得越来越……”，当形容词为多音节词（少数双音节词）时，用 “ more and more + 原级”。
It gets warmer and warmer when spring comes.
② “the + 形容词比较级……，the + 形容词比较级……”意为“越……就越……”。
The harder you work at your study, the better grades you will have.
③ “one of the +最高级+可数名词复数”表示“最……之一”。
Chengdu is one of the most beautiful cities in China.
④ This is/was + the +最高级+名词+that引导的定语从句。
  This is the most interesting story I have ever read.
三级句型之间的转换
① 形容词比较级+than any other+单数名词
  This book is more difficult than any other book here.
  = This book is the most difficult of all.
  形容词比较级+than the other+复数名词
  Bill is taller than the other students in his class.
② 同级比较用as...as..., 否定式为not as...
  He is as tall as his father.    He is not as tall as his father.
③“more+形容词”与“less+形容词”及“not so/as ...as”的互换。
weight常用短语  This question is more difficult than that one.=That question is less difficult than this one.
  =That question isn’t so difficult as this one.
13. 倍数表达法，
1）A+谓语动词+倍数+形容词/副词的比较级+than +B  表示A比B…多少倍
2）A+谓语动词+倍数+as+形容词\副词的原级+as +B  表示A是B的多少倍？
3）A+谓语动词+倍数+height/weight/length/size…+of +B
表示A的高A/重量/长度/大小…是B的多少倍？
Eg.
1）He runs three times faster than his brother.
2）His father is twice as tall as he .
3）This hill is four times the height of that small one.