My friend heavier than mine.中哪错了?

My friend heavier than mine.中哪错了? My friend heavier than Mary.哪里错了 is your school bag heavier than (my mine) the litter boy can 英语：Is your dog (1)heavy (2)heavier than mine?Yes,my dog is h 还有一个.your mine is than and backpack heavier bigger my box is bigger and heavier than your哪里错了 a friend of mine= my friend 1、Mike is heavier than me 2、Mike's ruler is longer than mine Whose bag is heavier,you or mine?哪错了? Yang Ling's school bag is heavier than mine.划线部分提问,划线部分为Yang My bag is heavier than your bag同义句转换 than,brother,heavier,and,I'm,taller,my,(.)