The students at this school have to wear uniforms,____they?我的答案是do,因为have to 译为"不得不",前否后肯,所以疑问句部分用肯定.对吗?

问题描述:

The students at this school have to wear uniforms,____they?
我的答案是do,因为have to 译为"不得不",前否后肯,所以疑问句部分用肯定.对吗?

don't they 不得不是肯定的意思