못하고

못하고

"못하고" means "cannot do" or "unable to do."

Here, '못하고' shows the inability to properly perform the action 'exercise'.

나는 운동을 제대로 못하고 있어.

I can't exercise properly.

In this case, '못하고' indicates that the person is unable to continue working.

그는 일을 계속 못하고 있다.

He is still not able to work.

Here, '못하고' demonstrates the missed action of preparation which contrasts with the following action of playing.

시험 준비를 못하고 놀기만 했어.

I didn't prepare for the exam and just played.