be back home如果前面有he怎么变?

be back home如果前面有he怎么变? He can't be at home.为什么在at前面有be?什么情况下要加Be? he won't be back home until ten. Be back home go back home be back home get back home come back home 可以互用吗 he got back home last He comes back home at____ he will get back home right away 改为同义句 he will be home ___ ___ ___. I WILL BE BACK HOME BACK HOME WITH MY LOVE He has to ________ by 10:00 o'clock.( ) A.be home B.is home C.back to home D.go to home 这句话里为什么要用Be?you must be home at night.如果把be换成come或back不也行吗?这有什么区别?如果是 come home这个home应该是名词吧~那跟在be后面home是什么词性? at home不是动词词组吗 为什么前面用be动词 例如He is not at home. 为什么welcome back to school前面有to,而welcome back home不能加to?school和home不都表示地点吗? we left after he came back home he ()(be)back next week I'll be back home.(同义句) I'll be back home.中will和be都是be动词吗?为什么会有两个be动词呢? 有没有 back to home