I don't know when Mr.Li ____ back.But I'll call you at once when he ___ backa.will come; will come b.comes; comesc.come; will come d.will come; comes为什么选D

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I don't know when Mr.Li ____ back.But I'll call you at once when he ___ backa.will come; will come b.comes; comesc.come; will come d.will come; comes为什么选D
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I don't know when Mr.Li ____ back.But I'll call you at once when he ___ backa.will come; will come b.comes; comesc.come; will come d.will come; comes为什么选D
I don't know when Mr.Li ____ back.But I'll call you at once when he ___ back
a.will come; will come b.comes; comes
c.come; will come d.will come; comes
为什么选D

I don't know when Mr.Li ____ back.But I'll call you at once when he ___ backa.will come; will come b.comes; comesc.come; will come d.will come; comes为什么选D
因为主句用一般现在时,从句选择相应的时态.这句说明他还没有回来,所以该用将来时.但是象ONCE,AS SOON AS 之类的引导的从句要用一般现在时态表将来.

因为他还没回来，所以前面一句用一般将来时，will come
后一句是用一般现在时表示将来的动作，用comes

因为是一般将来式啊！表示将要怎么样，后半句有I‘ll了所以后面用第三人称单数

D

I don't know when ( ) famous I don't know when leave 还是I don't know when to leaf Mr.tian,you don't know how much i hate I don't know when I have been loving I don't know when we should leave for Nanjing.=L don't know when ___ _______ ________NanjingMr.Mark left Shanghai two months ago=Mr.Mark has _____ ______from Shanghai for two months when () Mr White __(leave) home?sorry I don't know I __(not notice) him leavingmother is going __(swim) this afternoon 改错 I don’t know when will they come I don’t know when we shall start the work. 英语翻译I don't know when( )for Shanghai.(leave) when it left scars can heal~i don't know~ But I don't know when he---------(go to bed) I don't know. I don't know ____ Mr.Green will come to see us .----He will help us with our English.A.Why B.when C.how D.where I don't know ____ Mr.Green will come to see us .----He will help us with our English.A.Why B.when C. how D. where “i don't know you know i don't know i don't know when the managerI don't know when the manager -----(return),but when be ----(come)back i ---(let)you know. I have known about Mr White but i don't know him.译成中文 I don't care when you leave because you don't know cherish me 什么意思 ?