问题补充:
单选题Idon’tknowifmyuncle_______.Ifhe_______,es; will comeB.will come; will es; comesD.will come; comes
答案:
D解析I don’t know if my uncle _______中含有 if引导的宾语从句,句意:我不知道我的叔叔是否回来,应该用一般将来时;If he _______ , I will be very happy中 if引导的是条件只状语从句,主句I will be very happy用一般将来时,从句要用一般现在时。所以选D.