A new teacher will come tomorrow who will teach you physics.
　　　（who 引导的定语从句和先行词 teacher 被 will come tomorrow 所分隔。）

　　　Computers are already widely used in industry and the time has come when ordinary people can use them as well.
　　　（when 引导的定语从句和先行词 time 被 has come 所分隔。）