write back to...back的词性

send back to中back的词性 it is back to work.back的词性? Will her write back to me?的肯定回答是? be back to do sth 中back 是什么词性? Write a letter back to Tom Granger 选词填空come back ,call back,write back,bring...to mind,look bac I am back home 中”back"和"home"的词性 Welcome back.中 back是什么词性 back 前为什么不加to back to back ordering the back to back Back to back back-to-back