Nothing are good for you if you do it like that 改错

Nothing are good for you if you do it like that 改错 It is silly for you to do it like that.改错 That's ( )you don't like it.If you're good at it,you'll find 改错.Why do you say like that? you are nothing for just do it if you got good ----If you like,I can do some shopping for you.----That's a I suggest that you do nothing about it for the time being. f --you are leaving your school,how do you like it--very good, good for nothing dislike you! 请问you are good for nothing 的意思 you are good for nothing是骂人的话么