as 和while题,I'm going to the post office__________you are there,can you get me some stamps?A asB whileAS也有当的意思,那为什么选D呢.
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as 和while题,I'm going to the post office__________you are there,can you get me some stamps?A asB whileAS也有当的意思,那为什么选D呢.
as 和while题,
I'm going to the post office
__________you are there,can you get me some stamps?
A as
B while
AS也有当的意思,那为什么选D呢.
as 和while题,I'm going to the post office__________you are there,can you get me some stamps?A asB whileAS也有当的意思,那为什么选D呢.
as 和 while 都有 “当“的意思
while 用在时间和地点
as 用在原因.等
while you are there
as you are going there
as 有正当...时候的意思
while表示正在发生
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“...
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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.
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AS ，while一般接ing形式