给你分析一下吧
这是个选择疑问句,回答当然是好还是不好咯
如果是 Do you think it is good?
回答是 Yes,it is.或 No,it isn't.
如果是 Do you think it is good or not?
回答是 I think it is good.或 I think it isn't good.
也可是 It is good.或 It isn't good.
Is it good or not?
回答是 It is good.或 It isn't good.