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人教版新目标九年级下册知识点总结
I. 重点短语
1. beg one's pardon
2. multiply …by…
3. slow down
4. wear out
5. try on
6. make a"， 接that 宾语从句时意为"认为"，"觉得"。
  I am thinking how to work out the problem.
  I think she is a good student.
当宾语从句含有否定概念时，通常形式上否定think ，但意义上却是否定宾语从句。
I don't think he can come.
I don't think it will be windy.
(2)think about 可接一个名词，动词-ing 形式或由疑问词引导的不定式或宾语从句，意思是
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"考虑……"。
I have thought about it for a long time.
Please think about how to tell her the bad news.
(3)think of 表示"认为"， 一般用于疑问句中，及what 连用。
    What do you think of the TV play? = How do you like the TV play?
2. big/ large/ great
上述形容词都表示"大"，但侧重点及程度不同。
  (1) big指具体事物的大小，强调比正常形体的标准大，既可用在普通场合，也可用在正式场合。它可用来指人的身材高大或"长大了"，还可表示"伟大"，"重要"之意。如：
Can you lift up this big stone?
On the last day I made a big decision.
(2) large特别强调远远超过标准的大，指体积、面积、容积、数量之大。如：
A whale is a large animal.
A large crowd collected at the gate of the theatre.
(3) great除了表示数量体积之大外，又指抽象的程度，意味着伟大性，重要性， 优越性；常用于抽象
或无形的东西；用于有形的东西时，常带有"伟大"，"大得令人吃惊"等意思，含有一定的感情色彩。如：
China is a great country with a long history.
He was one of the greatest scientists.
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3. cost/ take/ spend/ pay
(1) cost表示"花钱"，花费，付出（只能用于钱、精力、生命等；主语必须是物。）
  The book cost me five yuan.
(2) take的主语是动词不定式, 通常用it做形式主语。
It took me five yuan to buy the book..
(3) spend，在主动语句中主语是人
I spent five yuan on (for) the spent five yuan (in) buying the book.
(4) pay的主语是人。
I paid five yuan for the book.
4. expensive/ high/ cheap/ low
    这四个词在谈论到价格的高低时，要注意使用。expensive及high涉及到价格"高"，而cheap 及low涉及到价格"低"。
  (1) expensive昂贵的，花钱多的。这个单词若谈到"价格高，货贵"时，其主语不能是价格，必须是货物、物品本身。如：
   This watch is expensive. 这只表很贵。
   These glass-products are not expensive. 这些玻璃制品不是很值钱。
注意：cheap表示"价廉"，"便宜的"，其主语也不能是价格，必须是物品本身。如：
The cheap table was bought from him. 这张便宜的桌子是他卖给我们的。
This cloth doll is very cheap. 这只布娃娃很便宜。
(2)high在表示价格时，含义是"高"，low在表示价格时，含义是"低"，这两个词不能用于物品本身，只
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能用在价格上。如：
The price of this watch is very high. 这只表的价格太高了。
The price of this book is not low