Question

【题目】-- Do you know if he to play football with us?
-- I think he will come if he free tomorrow.
A.comes; is
B.comes; will be
C.will come; is
D.will come; will be

Answer 1

【答案】C
【解析】问句是宾语从句，根据问句句意“你知道他是否要来和我们一起踢球吗?”可知，此处应用一般将来时；答语是if引导的条件状语从句，其时态根据“主将从现”的原则可知，主句为一般将来时，从句为一般现在时。故选C。