问题描述：
关于状语从句 WHEN WHILE AS引导词的辨析
While the alien was buying a souvenir,the girl called the police.
ING谓语动词是不是延续性动词的标志?这时的While是否可以和when.as互换?是不是While引导时间较长,而as用于时间较短的?as引导的从句谓语动词也可是连续性动词吗?
Mother was worried because little alice was ill,especially as(when while)father was away.为什么此时这三个都可互换?
请针对上述我的提问做下解答,不要长篇大论,基本都看过了
While the alien was buying a souvenir,the girl called the police.
ING谓语动词是不是延续性动词的标志?这时的While是否可以和when.as互换?是不是While引导时间较长,而as用于时间较短的?as引导的从句谓语动词也可是连续性动词吗?
Mother was worried because little alice was ill,especially as(when while)father was away.为什么此时这三个都可互换?
请针对上述我的提问做下解答,不要长篇大论,基本都看过了
问题解答：
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