英文句子問題

年青人對佢地d fd 同學使用暴力
young people used force with their friends and classmates.
年青人常用暴力對待佢地d fd 同學 Youngsters used to serve with violence (or fist) to their school-mates.
serve = 招呼, 對待.

Um.. it may be okay but i wil suggest:

Young people resort to violence when dealing with their friends.