高一英语：知识点总结Unit3-4(15)
8. used to
(1) used to do sth. 过去常常……(现在已不如此)
We used to grow beautiful roses.
注意：否定句和疑问句有两种
You usedn’t to make that mistake.
She didn't use(d) to do it, did she?
You used to smoke a pipe, didn't you? / use(d) n't you?
(2) be / get / become used to + n. / doing 习惯于
I have always been used to hard work.
He got used to living in the country.
(3) be used to do 被用来做……
This knife is used to cut bread.
表示“过去常常……”时，used to与would区别：
(1) would 只强调“过去常常……”，used to 说明现在不是如此。
The old woman would sit there for hours doing nothing.
(2) would 只接行为动词，used to 可接行为动词和表状态的词。如：be, like, know, have。There used to be a temple at the foot of the mountain.
9. watch out 当心;注意
You'll be cheated if you don't watch out.
(1) watch out for = look out for 提防;当心
You must always watch out for the traffic here!
(2) watch over 照看;看守;负责
The mother bird is watching over her young.
10. 含“动词 + out”短语
① come out 出来，出版，传出
② go out 出去，熄灭，不时兴
③ look out 当心，注意
④ take out 拿出，取出，带……出去
⑤ rush out 冲出去，匆忙大量生产
⑥ try out 尝试，试验
⑦ watch out 小心
⑧ wear out 穿破，用坏，(使)疲乏，消磨
⑨ find out 找出，查出
⑩ make out 填写，完成.设法应付
get out 出去，逃离，泄露，公布
pick out 看出，选出
think out 想出
give out 发出，筋疲力尽
set out出发，陈述
(责任编辑：康彦林)
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