It was noon when he came back?是什么从句?

It was noon when he came back?是什么从句? It was eleven when he came back .请问when 引导什么从句,怎样译? it was 2pm when they came back 是什么从句啊, 强调句中,比如it was 9 when he came back.和it was at nine when he ca when he came back from work ,it was ten o’clock.同义句 He _____ It was at two o'clock p.m.when he came back.哪里错了? When ho came back from his work,it was half past nine.=He __ It was 7 o'clock when he came here yesterday. 是定语从句吗? When i came back,I found nobody_________.It was empty. was,Rose,raining,back,when,it,came连词成句 It was 3 years ago ______ he came back. when he came back to