اسئلة الاعضاء

[Mr Mostafa Goda]

. The main clause is It's a must, and the correct tag is isn't it. The tag is normally based on the main clause unless the main clause expresses the speaker's opinion (I think, I believe, etc.).

It's a must that all employees follow the rules of the company, isn't it?

All employees must follow the rules of the company, mustn't they?