1.先行词是one;ones;anyone或者those时。
例如:
a.One who dares nothing often tells the truth.
无所畏惧的人常说实话。
b.God helps those who help themselves.
自助者天助。
c.We forgive anyone who hurts us by accident. 我们原谅任何一个不是故意伤害我们的人。
2.当先行词指人并含有较长的后置定语或在被分割的定语从句时。
例如:
The boy was crying hard who had lost his favorite bike.
这个男孩弄丢了自己最爱的自行车,哭得很 伤心。
3.There be结构中,主语是人时。
例如:
There is a girl who is waiting for you.
有个女孩在等你。
(加油!)