{初二英语}关于进行时表将来（be going to do)
如上.
只能用be going to do表将来么?能用be doing么?
请您看这道题
My brother is (going hiking) for vacation.（对括号内部分提问）
____ your brother ____ for vacation?
答案是What's;doing
请问这个是将来时还是进行时?
如果问句是What's your brother going to do for vacation?那么应该括起来哪个词组或单词?