he is come 用he will come back行不行?

he is come back不对
he is back或者he comes back,he will come back=he will be back正确

He is coming back. =he will come back 他将要回来

he is come back不对吧？he comes back.

亲，正确用法是：
he is coming back，如果说he is come back 是不存在的。因为这句话中存在了2个动词，
一个是be动词，一个是come，一句话中不可能存在2个动词。
或者
he will come back 。可以哦。