2023年初中英语状语从句难点——as when while的辨析
难点——as when while的辨析
as when while都表示主、从句动作同时发生,三者差异如下:
表示“一边。。。一边"的意思
as 强调两个动作同时进行,并表示对比时
用于发生时间较段时
when 1、还可以表示从句动词的动作在主几句动词的动作"之前 "或"之后"发生。
2、when=and then; at that moment (正在那个时候)
while 1、用于时间较长时
2、 强调两个动作同时进行,并表示对比时
有时这三个连词可以互换,有时不可以。
lit was raining hard when (as) i got there.
我到那里时,正在下大雨。 ( 动作同时发生,when可换为as, 但不能换为while,因为get是点动词.)
lwhen i had read the article, he called me.
我看完这篇文章之后,她给我打了电话。( 从句动作发生在主句之前,注意时态表达,只能用when )
lwhen i got to the cinema, the film had begun.
(当)我到了电影院时,电影已经开演了。(从句的动作发生在主句之后,只能用when,并要注意时态)
lhe was about to leave, when the telephone rang.
他正要离开,忽然电话响了。( 此时不能放在句首。主句动词一般表达 “正在” “即将”.
while, as不能代替 ) 考点
lshe thought i was talking about her daughter, while, in fact, i was talking about my daughter.
他以为我在谈她女儿,然而,实际上在谈论我女儿。(表转折,对比,when, as都不能代替它) 考点
lwhile the alien was buying a souvenir, the girl called the police.
外星人买纪念品时,那女孩给警察打了电话。(表示主句,从句的动作同时发生,while后引导的状语从句的动词必须是延续动词不能是点动词,因为它表示较长时间)考点
lmother was worried because little alice was ill, especially as (when/ while) father was away.
妈妈担心,因为小爱丽丝病了,特别是他父亲不在家的时候。(此时as ,when, while可通用)