You should not underestimate his ability.

His ability is underestimated.

He is overestimating his own abilities.

I think his abilities are overestimated.

She is planning a date with her current boyfriend.

He lost everything.

My boyfriend gave me a gift.

Everyone was surprised by the news.

He likes to take a walk in the park at dusk.

By regularly checking the key performance indicators, you can understand the performance of the company and devise improvement measures.