A:you from the USA?B:No,i come Canada.are you from?

问题描述:

A:you from the USA?B:No,i come Canada.are you from?

这句话过于口语化。有语法错误。
A:你来自美国吗?B:不,我来自加拿大。你呢?

A:你从美国来?B:不,我来自加拿大。你呢?

A:Are you from the USA?
B:No,I came from Canada,where are you from?