( ) The boys are playing football while the girls are singing and dancing.
A as B when C before D while
while引导的时间状语从句用进行时态.
我是英语教师,不明可再问.
( ) The boys are playing football while the girls are singing and dancing.
A as B when C before D while
while引导的时间状语从句用进行时态.
我是英语教师,不明可再问.