You will see many stars is the sky_____you come out at a fine night.答案是if,为什么不用when?

问题描述:

You will see many stars is the sky_____you come out at a fine night.答案是if,为什么不用when?
顺便说说答案到底是哪个?

第1 最重要的原因是,用if引导条件状语从句,主句才加will,如果是when引导的从句,那么和主句的时态应该一致.
第2 at a fine night已经是时间状语,如果用从句如果用when引导,就冲突了.