while 后面接延续性行为,但这个动作肯定和主句动作时间不一样长。如:he was talking to me while he was watching the tv。应该说“看电视”比“谈话”时间长。而as通常两个动作一直相随,很可能时间相同。如:he was thinking of a question as watching the tv。这两个动作就是一直相随的。
as意为“一边……一边……”或“与……同时”,重在表示动作同时发生、伴随进行。while只指“时间段”,不指“时间点”,从句的动词只限于持续性动词。
1 从句表示"随时间推移"连词能用as,不用while。
As the day went on, the weather got worse.
日子一天天过去,天气越变越坏。
2 as引导短暂性动作的动词。
Just as I stopped my car, a man came up to me.
希望能对你有帮助,记得采纳我的答案哦~!
有。
1 while往往是两个不同的主语:
Tom is a very active boy while his twin brother tim is much too shy.
2 as 句中的主语往往是同一个主语,并且as这个句子要倒装:
Busy AS she is, she finds time to see us (注意了吗,busy与as调换了位置,这就是倒装。)
Though she is busy, she finds time to see us.
很简单,在句中的位置不同,强调的部分不同
举个例子说明下:
Tom想去游泳而Jim想去跳舞
Tom likes to go swimming while Jim likes to go dancing.
(语气不偏袒任何一方,只是做对比)
As Tom likes to go swimming, Jim likes to go dancing.
(语气偏袒Jim,As做让步)
while用作表示虽然是简单的来说是对比 前后连个动作的对比 【例如:爸爸在床上睡着,与此同时,妈妈在厨房里洗碗】 另外while后动词用ing形式
as的话要注意前后时态。
while强调对比
as强调让步