()(也许)the man at the gate is a policeman.

问题描述:

()(也许)the man at the gate is a policeman.

maybe和perhaps都可以,前者是较口语化,后者不可能的意味比较大

Maybe/Perhaps都可以

Maybe (也许)the man at the gate is a policeman.
也许,门口的那个男子是个警察