I've been stuck on this question for over 10 mins. This chapter is on prepositions. The sentence is „Please keep confidential memos off of your desk.“ The question my instructor is asking is this sentence written correctly? True or False. The answer is „False“, but I cannot explain why. It sounds like something I'd say or write. I don't understand why its grammatically incorrect. I've gone through my chapter and my notes. Please be nice. I've been out of school for almost 25 years. I'm sure I learned this somewhere but it's just not obvious to me.
Thank You. 19216811.mx