麻烦老师教下I had just started back for the house to change my clo

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麻烦老师教下I had just started back for the house to change my clothes ( ) I heard voices.
A.asB.whenC.afterD.while答案是B我不懂as为什么错,还有as在从句中要当成分吗 ,as 是引导时间点还是时间段的从句,请老师说下从句中as和when区别

when, as, 引导时间状语从句时,侧重点有所不同:
1.when可指时间点,又可指时间段,从句中可用延续性动词,也可用非延续性动词.
2.as多用于平行结构,表示两个动作同时发生：一个主语同时进行两个动作；一种状态随另一种状态的变化而变化.
3.表示主句的动作发生在从句的较长动作过程中,when, as均可使用.从句中为be动词时,多用when.谈论两个平行动作或两种状态变化多用as.

麻烦老师教下I had just started back for the house to change my clo 请问I had just started back for the house to change my clothes 24.I had just started back for the house to change my clothe I had just started back for the house to change my clothes w I had just started back for the house to change my clothes _ 请帮我翻译:I had just stared back for the house to change my clot 英语翻译My day started just like all the other days.I left for t 解释下______Thinking back to the feeling that I had . 英语翻译so i had no time to change my clothes for dinner.then i just as iwas leaving the house,it occurred me that i had for Just as I was leaving the house,it ______ to me that I had f 英语翻译I had to wait for the red light to change to green．It wa