we'll go for a picnic if it ___ this Sunday.a.won't rain b.isn't raining c.doesn't rain d.don't rai

问题描述:

we'll go for a picnic if it ___ this Sunday.a.won't rain b.isn't raining c.doesn't rain d.don't rai

C,这是一个典型的主将从现句子,也就是说主句用将来时,从句用现在时.句中主语是we,后跟will,if引导的从句中rain是动词,用助动词do修饰.这句话的意思就是:如果这周日不下雨我们将去野餐.