I don't know when he can go back home.如何改为同义句

But I don't know when he---------(go to bed) I don’t know when he (arrive). When he (arrive) here, I will call you. I don't know when he ____,I must talk to him when he____.(come) I don't know when ( ) famous I don't know that one can change his i( ) when he is 60 I don't know when he _(come)back.when he _(come)back,I will call you I don't know what he needs I don't know when leave 还是I don't know when to leaf I don't know when he can go back home.如何改为同义句 I don't know when he ___(arrive）填什么是will arrive 还是has arrive I don't know when he ＿（come）back.快 I don't know .when did he go there yesterday?合并为一句 I don't know when he ____,but when he ____,I will let you know.A will come ;comesB comes ;will comeCcomes;comesD will come; will come I don't know when he ____ back tomorrow.Don't worry,I 'll call you when he____ back.will come,comes.求说明. 1. I don’t know when ______ the dictionary.. A. did he know B. he borrowed C. he borrows D. does he borrow He ------- Beijing .I don't know when he did it.A has gone to B has been to选哪个 I don't know when I have been loving 1I don't know when he (arrive).When he (arrive),I wasn't in.2 While she was washing hair,her father (come) back.