I don’t know if he ________ back tomorrow. If he ______ back, I’ll let you know.

I don’t know if he ________ back tomorrow. If he ______ back, I’ll let you know.

题型:不详难度:来源:
I don’t know if he ________ back tomorrow. If he ______ back, I’ll let you know.
A. comes; will come             B. will come; came      C. will come; comes
答案
C
解析
if翻译为是否,属于宾语从句。如果主句是一般现在时,从句根据需要选择时态,如果主句是过去时态,从句要用相应的过去时态。该句主句是一般现在时,故根据句意从句用一般将来时。在if引导的条件状语从句中,如果两个动作都没有发生,为了区别动作的前后关系,先发生的用一般现在时态,后发生的用一般将来时态,即主将从现。句意:我不知道明天是否他会回来。如果他回来了我会告诉你。故选C。
试题分析:
举一反三
People along the river didn’t allow them to ______ a factory so as not to pollute the water.
A.set upB.give upC.take upD.look up

题型:不详难度:| 查看答案
—Could you tell me       ?       —Certainly.
A.who is he likeB.who are you waiting for
C.what is his nameD.what he looks like

题型:不详难度:| 查看答案
_______ I had no time to travel, I still felt very happy.
A. Though                           B. But  C. So
题型:不详难度:| 查看答案
The city has improved a lot _________ I came here a few years ago.
A. for  B. since    C. before
题型:不详难度:| 查看答案
Hurry up, _________ you will miss the bus.
A. or   B. and  C. but
题型:不详难度:| 查看答案
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