Question

I don't know where Jack is now. ________ is in the cinema.

1. A.
   Maybe he
2. B.
   May be he
3. C.
   He may be
4. D.
   He might be

Answer 1

A
副词maybe常见于美国英语中，在句中用作状语，意为“很可能”“大概”，相当于英国中的perhaps，常放于句首。may be是“情态动词+动词原形”的形式，在句中作谓语，意为“可能是”。