1) Ben might have misunderstood you.
2) Mark may take part in the discussion.
3) They might have changed their mind.
4) You may have to correct the mistakes yourself.
5) He might have found difficulties to prove it.
6) This work may take a lot of time.
7) Nik might have given up this idea.
8) You might have disappointed him.
9) Nik may not take your words seriously.
10) Something might have happened.