she does not know when it __will rain_____(rain)

问题描述:

she does not know when it __will rain_____(rain)
when it _rains___(rain),I _will tell____(tell) you.
Please tell me when it _rains______(rain).
请告诉我这样填的理由

When引导的时间状语从句,主讲从现,主过从过.