i’ll let you know______he comes back

------ he comes back,I'll tell you I’ll let you know ____ he comes back.A． 状语从句练习1.I’ll let you know ____ he comes back.A.before B.beca I’llcall you when he comes back可以换成when he comes back I’ll c may I know______he told you? i'll stay here_____everyone comes back I don't know （） come back soon. （）back ,I‘ll let you know ( )71.I’ll tell him to give you a call____ he comes back. ok!i'll tell him when he comes back 还有thank you very I will let you know as soon as he comes back. 什么意思啊? 1.I don’t know_____come back soon____back,I’ll let you know. i'll never let you