Does that sign interesting?Yes,Ithink so.does 用在这里合不合适.

问题描述:

Does that sign interesting?Yes,Ithink so.does 用在这里合不合适.

应该是Is

应该为is不是does.你可以把他还原成陈述句,That sign interesting 显然错误.故不能用does,只能用is