Is this teacher's office?还是应该说Is this a teacher's office?如果改为陈述句呢?this is teacher's office.还是this is a teacher’s office

问题描述:

Is this teacher's office?还是应该说Is this a teacher's office?
如果改为陈述句呢?this is teacher's office.还是this is a teacher’s office

Is this teacher's office?
这是老师办公室吗?
不过,我倒是觉得应该用 teachers’ ...除非这个办公室专属一个老师。。

Is this teachers' office.不能用 a