he comes back .I tell you at once,改为条形状语、怎么改?

he comes back .I tell you at once,改为条形状语、怎么改? He comes back .I tell you at once.(改为条件状语从句) He comes back.I'll tell you at once.改为条件状语从句 格式：I ___ ___ yo ------ he comes back,I'll tell you He will tell you the seciet when he comes back.(改为同义句)PS:不用w I'll give him your message at once [ ] he comes back from lu After Linda comes back,i will tell you the result.(改为同义句) 1.I __ (wait) until he comes back.2.Can you tell me if it __ your brother in?-No.（）he comes back,I will tell you. As soon as he comes back,I will tell him when( you will come ( )71.I’ll tell him to give you a call____ he comes back. I will tell you when he comes back tomorrow.是什么时态