1.ache指“(人)身体疼痛”，往往用于持续的疼痛或因一些小病引起的感觉，常指“局部的”疼痛。
back、ear、head、heart、stomach、tummy、tooth等词与ache构成复合词，表示身体部位的疼痛。如果指身体其他部分之疼痛可以用pain或ache表示，如：a
pain /ache in my foot脚痛。 ache也可作动词，如：I ache all over.我全身疼痛。 My head
aches.我头痛。 2.pain指“肉体或精神上的痛苦、悲痛”，比ache要严重些，如：She is in great
pain.她深为痛苦。 The boy broke his arm and cried with
pain.那个男孩摔断手臂，痛得大叫。 pain也可以当及物动词，指“使痛苦”，如：My foot is still paining
me.我的脚还在痛。 aches and pains指“疼痛”，如：I have aches and pains all
over.我全身疼痛。
3.hurt只作动词，可以指“(使)受伤，(使)疼痛，伤害”，如：He hurt his back when he fell.他跌倒时伤了背部。 He was badly hurt in this traffic accident.在这起交通事故中，他受了重伤。 Did you hurt yourself?你弄伤自己了吗? hurt也可以指“伤害(某人的感情)；使伤心”，如：My feelings were hurt when he didn\'t ask me to the party.他没邀请我参加宴会，我很伤心。 hurt还可以指“受损伤、有害、有不良影响”，如：It won't hurt to wait a bit longer.再等一会儿(对你)没有什么关系。 Their business was hurt by the terrible storm.他们的生意因暴风雪而受损。
3.hurt只作动词，可以指“(使)受伤，(使)疼痛，伤害”，如：He hurt his back when he fell.他跌倒时伤了背部。 He was badly hurt in this traffic accident.在这起交通事故中，他受了重伤。 Did you hurt yourself?你弄伤自己了吗? hurt也可以指“伤害(某人的感情)；使伤心”，如：My feelings were hurt when he didn\'t ask me to the party.他没邀请我参加宴会，我很伤心。 hurt还可以指“受损伤、有害、有不良影响”，如：It won't hurt to wait a bit longer.再等一会儿(对你)没有什么关系。 Their business was hurt by the terrible storm.他们的生意因暴风雪而受损。