I don,t know if your father__________(comes back/will come back)

题目

I don,t know if your father__________(comes back/will come back)

答案

will come back
句中if做连词,意思是是否,主句一般现在时,从句无时态限制,根据意思用将来时
注：当if解释为如果时,有特征“主将从现”