wear down,wear out,wear off的区别是意思的不同。
1．wear away
逐渐磨损，磨蚀出凹痕 (常指木、石等，而且主语常为风雨等自然力或人的踏踩、拭抚等)
2．wear off
逐渐减弱，渐渐消失(主要用来指体力或精神上的感觉)
3．wear out
①穿旧，穿破(用到无法再用为止)，
②磨损，磨破，
③使人疲惫不堪(指人，常用于被动语态)
扩展资料：
1、wear away 例句：
① It is almost impossible to read the inscription on the monument as most of the letters have been worn away．
（几乎没有可能读到纪念碑上的碑文，因为大部分信件都已磨损殆尽。）
② Water can wear away rocks after a long time, even though the rock is harder.
（水可以很长时间磨损岩石，尽管岩石更坚硬。）
③ The footsteps of thousands of visitors had worn away the steps.
（成千上万游客的脚步声把台阶磨坏了。）
2、wore off 例句：
① For many the philosophy was merely a fashion, and the novelty soon wore off.
（对许多人来说，哲学只是一种时尚，新奇感很快就消失了。）
② These glasses may seem uncomfortable at first but that feeling will soon wear off．
（这些眼镜起初看起来不舒服，但这种感觉很快就会消失。）
③ When her first feeling of shyness had worn off she started to enjoy herself．
（当她第一次感到羞怯的时候，她开始玩得很开心。）
④ He began to try to sit up，which showed us that the effects of the drug were wearing off．
（他开始试着坐起来，这表明药物的作用正在减弱。）
3、wear out 例句：
① Children wear out their shoes very quickly.
（孩子们很快就会穿坏鞋子。）
② The machine had been worn out seriously because of incorrect operation. Cheap clothes wear out quickly．
（这台机器因操作不当而严重磨损。便宜的衣服很快就穿坏了。）
③ The young people run around kicking a ball, wearing themselves out. He worked all night and wanted to go on working the next day，but we saw that he was completely worn out and persuaded him to stop．
（年轻人跑来跑去踢球，把自己累坏了。他工作了一整夜，想第二天继续工作，但我们看到他筋疲力尽了，劝他停下来。）