请选择he will be back ______half an hour.( in ,after )正确答案是in,我想知道为什么不用after

请选择he will be back ______half an hour.( in ,after )正确答案是in,我想知道为什么不用after he will be back tomorrow中的be how soon will he be back对吗 He will be back in four days 请说明为什么选xx.o(∩_∩)o25.-----Do you know ____________?-----Sorry,I don’tknow.A.when will he be back B.when he will be back C.when does he be back26.While I _________,she came in.A.am talking B.was talking C.talked27.Mike is as _______ I think he will be back_ in an hour _对划线部分提问 __ __ you think he will be back he will be back home （）tomorrow morning,答案选择的是什么都不填,可是为什么不选择on呢 _( )will he be back? _In two days A How soon B How long C How often D How many说明你选择的理由 并解释In two days中In的意思 He ___ back this evening.(will/will be) He will be back __ a few weeks.A.in B.on C.for D.at选择正确答案. Will he back tomorrow?Will he be back tomorrow?哪一句对,为什么? l think he will be back soon.为什么不能写成 l think he will back soon . When will he be back when will he come back When he came back 他什么时候回来,都是什么动态 选择.My sister ____ in a week.A.will back B.will be back C.is back D.was back 以下两个句子的be的用法He will be in his small boat,Topsail.He will be away for two mouths.请解释一下这两个be的用法和在什么情况下需要这样用.he has not be back yet,he will be back ten minutes.he has not back yet ,里面 I don't know when he _(come)back.when he _(come)back,I will call you 请讲明选择这个选项的原因He will be back _________.A.for a while B.after a while C.in a while D.once in a while im sure he will be back [ ] [ safe] soon