信……
15.It +has+been +一段时间+ since+从句 自从……以来已经有很多 长时间了
16.dare to do sth 敢于做某事 17.It‘s adj+ for sb+ to do sth对某人来说做
某18.take up doing sth 开始做某事
三．语法全解
1. 辨析：
used to do sth. 过去常常做…
get/be used to sth./doing sth. 习惯于… be used to do 被用于做…（被动语态）
be used by 由(被)…使用（被动语态）
be used as … 被当做…使用（被动语态）
be used for doing 被用于做…（被动语态）
: I used to go to work by bus. Now I take a taxi.
He used to be a problem boy. She used to be very shy.
I‘m used to drinking a cup of water after meal.
He‘s been used to living in the dormitory.
A hammer is used to drive nails.
This machine is used to clean the floor.
The girl is being used as a servant in the house.
A knife can be used for cutting bread.
2) afford（支付得起）的用法
afford sth 买得起…… afford to do sth 有足够的…去做…
例：His mother couldn‘t afford to pay for her child‘s education.
They did not consider whether they could afford the time or not.
We can‘t afford to pay such a price. （such和so区别见P110）
3) take pride in sth/ sb = be proud of sth/ sb 为…感到自豪
例：He was watching me and take pride in everything good I do.
I take pride in my child. =I‘m proud of my child.
注：He take pride in everything good I do. 这是一个定语从句。省略了关系代词
。先行词为不定代词时，关系代词只能用。
4）the+序数词+最高级+N 第几（大/长/高…）
One of the/形容词性物主代词+Ns
例：He is now one of the best students in his class
One of my best friends is a doctor.
One of his most expensive pens has been lost.
The yellow river is the second largest river in china.
Mount Qomolangma is the first highest mountain around the
world
第四单元检测