■ off of

这两个形状很相近的单词放在一起，并不奇怪。前面的 off 在这里是副词，后面的 of 是介词，加在一起，念成 offa，意思是“从…上面去掉”。

• Get this bug off of me!快点把这只虫子从我身上弄掉！
• Climb down off of that horse with your hands in the air.举着双手，从马上爬下来。
• The scandal has taken much of the luster off of the event.丑闻使得那次盛会大为失色。
• ... said he has been waiting 30 years to recreate the car he saw Roger Moore use to drive off of a dock. (The Associated Press, Feb. 14, 2008)…他说，他曾经看见过罗杰· 摩尔开车冲出船坞，后来等了三十年，才重新创造出这样的车子。
• Why can't we have a compromise? Legalize just marijuana. It's really no worse than alcohol. It's easier to educate and get people off of compared with the addictive drugs. (US News & World Report, Aug. 18, 2008, p.14)（讨论麻醉品可否合法化的问题）咱们为什么不能来个折衷呢？就单让大麻叶合法化吧。它不见得比酒精更坏。它比起那些上瘾药物更为容易教育人们去戒掉（off of 的逻辑宾语是 it，即 marijuana）。

但是，off of 只是美国常用的，而且有些人表示反对，认为应该把 of 去掉，例如：Take your shoes off of the bed. 应该改为 Take your shoes off the bed. 又如：The book fell off of the desk. 应该改为 The book fell off the desk.