In my opinion,people puberty (is)at the age of fourteen to eighteen.(In that age),many people has teenage rabellion .
这句话没有谓语
They doesn't(dont) want (to)study .listen to (their) parent(s) and teacher(s) or(删去) some people (even)start smoking,fall(ing) in love,fighting,doesn't back home(and dont want to go home) .parent(s) doesn't (dont)want to see their child chage for a bad men,and bring up then,but not chage anything.(这句不知道你要说什么)
同学,看得出,你的基础语法还比较差,还是要从头多学学,看完一个语法点之后然后做练习,先写简单句,慢慢练习,就会有进步了