一.作为副词,它有以下的用法: 1. 作为疑问副词,引导特殊疑问句,意为“什么时候:何时”.如: ( 1 ) When will they come back?( 2 ) What time will they come back?回答 when 引导的从句,不一定指出具体的时间点.如回答句( 1 )可用 tomorrow, next month 等.而回答 what time 引导的问句,则必须说出具全的时间点,如 at two o'clock, at five past ten 等. 2.…