he come back. back是什么词?

he come back. back是什么词? Did he come back early? When he will come back he has just come back he has not come back 反意疑问句是什么 he said,"i'll come back soon" he will come back in a miniute tell me when he will come back To my s________,he has come back. Wait until he _(come)back. he will come back in two months He will come back in a few