unit 1
1． help的用法。
及物动词 “帮助” help sb+动词原形/不定式或者用help with, 八单元有help out 这个短语。
不及物动词 “有效，有用” it helps a lot. does it help?
不可数名词，ask sb for help
2. too---to---
表示否定意思，the child is too young to go to school.
表示肯定意思， the story is too easy to understand.
too后面若是表示心情，情绪的词，如glad, pleased, happy, ready, easy,则多是表示肯定。too---to 表示否定的意思时，改成so---that---句型，一般用can’t或couldn’t 例，the box is so he**y that he can’t carry it.
he is too tired to walk on.
he is so tired that he can’t walk on.
3. 记住以下几个形式上相近的单词。
difficultdifficultly difficulty / difficulties
differentdifferentlydifference / differences
形容词副词名词。
4．特殊句型 h**e +名词+动词ing形式。
we had fun playing basketball just now.
he has difficulty reading the letter.
5. by的用法。
① 通过---方式，途径。
he makes a living by selling news*****s.
② 交通方式 by bike , by bus
③ 在---之前，到---为止，分两种情况。
a, by后面是一个过去的时间， 则该句用过去完成时。
the film had been on ten minutes by ten o’clock this evening.
b, by的后面是一个将来的时间，则该句we will learn 1000 words by next saturday.
④ 在被动语态中用来表示动作的执行者。
the boy was hit by a car.
6.所有格不用 ’s, of 的词， 而是加 to
solution keyanswer
例如，i can’t think of any solution to her trouble.
7. mistake
①名词， make a mistake make mistakes by mistake
②动词， “误会” i often mistake him for my cousin.
8. 复句改不定式短语。
he wants to know when he should le**e. (主句和分句的主语是一个人)
he want to know when to le**e。
有些主句和分句主语不同的复句在改写时要用被动语态。
the girl wanted to know when her father would take her to paris.
the girl wanted to know when to be taken to paris.
9. 宾语前置， 介词不丢。
i often practice english with my partner.( partner是with的宾语)
i don’t h**e a partner to practice english with. （with要保留）
i need a pen to write with.
i need some ***** to write on.
10. be popular with sb
the teachers are popular with us.
11. how --deal with 怎样处理。
what---do with 怎么处理。
12. 把---比作什么，把---与 --相比。
we often compare children to flowers.
13. regard---as---把---看作什么。
he regards his physical problems as unimportant.
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