新概念英语第二册54-01

P205

Structure

No.3

while doing 两者同时发生

while sb was doing 当......时候

能用while; as 的地方就可以用 when, 反之则不一定.

A

when 后的时间表达既可以是点， 也可以是段.

while 后的时间表达只可以是段.

as 等同于 while.

No. 7

send = take / give

send / take / give sb sth

双宾语一般用离动词最近的宾语来做被动语态的主语.

sb be send sth

send sth to sb

sth be send to sb

C

No. 6

对名词的提问用what

D

No. 10

contain / container

include 指一种抽象的包含

B

No.12

a time 一段时间

for a long time

after a time = after some time

No. 9

C