Despite their difference in status, the boys develop a strong friendship.

With no room to run around and play, the little boy developed behavioral problems as a toddler.

The treatment was successful and the boy did not develop rabies.

"It's a wonderful thing to watch how those boys developed."

Then, even the hard boy developed a mild case of cooperation fever.

The boy, in particular, also developed some aggressive behavior problems.

"A boy like you should develop his body, and morals."

It may be that girls' and boys' brains develop at different rates.

A young boy who fell in love with Sukji, and their relations developed successfully.

I think our boy is developing an immunity to the drugs.