一道英语语法选择题.Mary,turn off the water__you are brushing your teeth.---Mary,turn off the water__you are brushing your teeth.---Sorry.I will do it at once.A、until B、while C、during D、whether 我知道B有道理.为什么不能选C啊~C是during.
问题描述：
一道英语语法选择题.Mary,turn off the water__you are brushing your teeth.
---Mary,turn off the water__you are brushing your teeth.
---Sorry.I will do it at once.
A、until B、while C、during D、whether
我知道B有道理.为什么不能选C啊~
C是during.
答
during后一般接一个时间段，如during the day,during the holiday,不接一个持续的动作！
答
during是介词，后跟名词
所以虽然意思解释得通，但语法不对
选B、while ，刷牙的时候关上水
答
during接一个时间段,比如three month
而while接一个时间点,比如刷牙时,while you are brushing your teeth
答
背下来，英语有些东西是死记硬背的！