He brilliantly caught the no-hopper ball.

He caught the ball on the fly.

He scored a goal while his opponent was not paying attention to him.

On no-game days, he relaxes at home.

He appeared in the event without an appearance fee.

She is good at playing the pianoforte.

He is struggling to understand the perfect tense in English.

He has already finished writing the report, so we use the present perfect form.

She is struggling to understand the perfect tense in English.

He is a very excellent performer.