sorry,I really don't know----------A.when your parents and brother would come backB.when your parents and brother will come back为什么不选B呢

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sorry,Ireallydon''tknow----------A.whenyourparentsandbrotherwouldcomebackB.whenyourparentsandbrotherw

sorry,I really don't know----------A.when your parents and brother would come backB.when your parents and brother will come back为什么不选B呢
sorry,I really don't know----------
A.when your parents and brother would come back
B.when your parents and brother will come back
为什么不选B呢

sorry,I really don't know----------A.when your parents and brother would come backB.when your parents and brother will come back为什么不选B呢
sorry,I really don't know----------
因为主句是一般现在时,所以从句时态用原来的时态
如果是sorry,I really didn‘t know...就是B了
如果你要表示过去,直接用过去时,不用用过去将来时的

难道will是肯定语气才能用,而would是在不确定语气的时候用的?我也不明白,请高手示下!!!