She is very smart, but as the proverb goes, 'A clever woman can't sell a cow,' she can't do everything well.

He often quotes proverbs in his conversation.

He is a very clever person.

He said, 'This problem cannot be solved.'

She is a very bright student.

He solved all the problems entirely.

He lost everything.

His irresponsible behavior damages the team's morale.

He failed to keep his promise.

She is my best friend.