Susan's keen eyes could see the smallest details
Roy was very keen for apples today.
A knife is a keen tool that is dangerous for kids to play with.
He takes a kee interset
The old man has gone off for holiday but he seem keen about his return
"Keen" is and adjective, used to describe something as sharp or acute. "The sword had a keen edge." "He was a man of keen intellect." It can also be used to express enthusiasm. "He was keen to learn another language."
Keen is an adjective. It is used to describe a noun or a pronoun as sharp, or finely sharpened. Examples include a keen edge, keen wind, keen eyes, keen mind.
The yearbook editor has a keen eye for detail.
I am very keen to see you. How are you doing?
His acute sense of hearing was quite keen.
hi
Yes, But you think that you write a right Question formula ?
There should be no 'and' in there. The sentence should go like this: The man is a scientist with a keen sense of observation who dedicates long hours in the lab.