学生疑问: should放在句首是什么用法?
老师解答:这是should带有虚拟语气用法的一个倒装,实际上是if引导的条件状语从句。变化规则:should 代替 if,从句中的动词变成原形,主句不变。If Carter invites you to his party, you need to wear your new dress.= Should Carter invite you to his party, you need to wear your new dress.
点评分析:以 should 开头的部分倒装,可用来描述将来可能发生的事情,属于真实条件句。