He requested that the students __help__tHe requested that the students __help__them get in crops 在表示建议要求的虚拟语气中,不是只有被动才可以省略should吗?这题该怎么理解,

问题描述:

He requested that the students __help__t
He requested that the students __help__them get in crops 在表示建议要求的虚拟语气中,不是只有被动才可以省略should吗?这题该怎么理解,