59. Do you know if /whether... 你知道是否……
Do you know whether it will rain tomorrow?
你知道明天是否会下雨吗?
Do you know if he is the right man for this position?
你知道他是否适合这个职位呢?
Do you know whether he comes or not?
你知道他到底来不来吗?
Do you know whether it will rain tomorrow?
你知道明天是否会下雨吗?
Do you know if he is the right man for this position?
你知道他是否适合这个职位呢?
Do you know whether he comes or not?
你知道他到底来不来吗?