cut off cut up cut down 的区别：含义不同、用法不同、侧重点不同。cut off意为切断，侧重于断掉经济供给或物理供给；cut up意为切碎，侧重于处理物体的动作；cut down意为削减，侧重于降低某种提供物的动作。
一、cut off的含义及例句
cut off意为切掉;割掉;砍掉;隔离;阻断;停止，中断（供给）;切断，中断（通话）;打断（讲话）。
例句：The electricity supply had been cut off.
电力供应被切断了。
The army was cut off from its base.
那支部队与基地失去了联络。
Landslides have cut off many villages in remote areas.
滑坡使边远地区的许多村庄与外界隔绝。
If you should be fired, your health and pension benefits will not be automatically cut off
如果你被解雇，你的医疗和养老保险金不会自动中断。
They were almost completely cut off from the outside world.
他们几乎完全与外界绝缘了。
二、cut up的含义及例句
cut up意为切碎、不高兴的、伤心的。
例句：Terry was very cut up about Jim's death.
吉姆的死让特丽无比悲伤。
Scraps of material were saved, cut up and pieced together for quilts.
边角碎料都保留下来，剪好后拼在一起做成被子。
Let's cut up the chicken and make some soup.
我们把鸡剁成块煨汤吧。
The film was severely cut up by many reviewers.
这部电影受到许多评论者的严厉批评。
三、cut down的含义及例句
cut down意为削减;减少使用;砍倒（树木）。
例句：You should cut down on fats and carbohydrates.
你应该减少摄入脂肪和碳水化合物。
They ordered that for every tree cut down two more be planted.
他们要求每砍伐一棵树就要补栽两棵树。
We're trying to cut down on the amount of paperwork involved.
我们正在努力降低有关此事的文书工作量。
I won't have a cigarette, thanks ─ I'm trying to cut down.
谢谢，我不抽。我现在尽量少抽烟。
