Do you have any idea what is actually going on in the classroom?中可不可以把what换成that做定语从句
问题描述：
Do you have any idea what is actually going on in the classroom?中可不可以把what换成that做定语从句
必须用what构成 what is going on吗
答
不能.这句中what 引导的是同位语从句,说明idea 的具体内容,不是修饰它.