못한다

못한다

"Cannot do" or "unable to do."

Here, '못한다' expresses inability to perform the action of swimming.

나는 수영을 못한다.

I cannot swim.

In this context, '못한다' is used to explain the reason for failing to keep the appointment.

그는 시간 때문에 약속을 지키지 못한다.

He cannot keep the appointment due to time constraints.

Here, '못한다' illustrates the impact of nervousness, resulting in the incapacity to speak.

그녀는 너무 긴장해서 말도 못한다.

She is so nervous that she cannot even speak.