Do you know when your father---- l do not know.But if he ----- ,l will tell you

问题描述:

Do you know when your father---- l do not know.But if he ----- ,l will tell you
Acomes comes B will come comes

B will come comes
第一空when引导宾从,时态用"一将",第二空,在条件状从中,用"一现"表将来动作.主将从现原则.
句意:你知道你父亲什么时候回来吗?我不知道.如果他回来了,我就告诉你.