send back to中back的词性

send back to中back的词性 write back to...back的词性 it is back to work.back的词性? 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 welcome back的back是什么词性 be back to do sth 中back 是什么词性?she will be back to parpre for dinner. send sb.back to +adj.还是v. I will be back 中back是什么词性? I will be back 中back是什么词性? send sth back went back home中home什么词性 the back to back Back to back back-to-back Send you something you don't give it back to i didnt go to bed until my father came back中until是什么词性 请问：英文中“int”代表什么词性?Shan,welcome back to here.句中的welcome是什么词性?