《重点知识梳理》
一、时间状语从句
(一)when,while与as引导的时间状语从句
1.when,while与as引导时间状语从句的区别
|
连词 |
谓语动词 |
用法点津 |
|
when |
延续性动词 非延续性动词 |
从句的动作和主句的动作可以同时发生,也可以先后发生 |
|
while |
延续性动词 |
从句的动作与主句的动作同时发生 |
|
as |
延续性动词 |
强调主从句动作相伴发生,可译为“一边……一边……;随着” |
when they heard the news that shenzhou ⅸ had been sent up into space successfully,they jumped with joy.
听到“神舟”九号成功发射的消息,他们高兴地跳了起来。
while i was reading,he came in.
我正在看书时,他进来了。
the students sang as they walked.
学生们边走边唱。
2.while还可以作并列连词,表示对比,意为“而,却”。
liu wang is from shanxi while liu yang comes from
刘旺来自山西,而刘洋来自河南。
例1、(2013·全国ⅰ,32)there's no way of knowing why one man makes an important discovery ________ another man, also intelligent, fails.
a.since b.if
c.as d.while
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