Marie’s question: “Is the following sentence correct? I appreciate your helping me. I have been told by a colleague that it should be ‘you’ not ‘your.’ I think I am right but I don’t know why.”
BizWritingTip response: Yes, you are definitely right. This grammar rule involves gerunds, a term many people are unfamiliar with. A gerund is a word that is normally a verb but is being used as a noun. Gerunds always end in “ing.” In your example, helping is a gerund.
The trick with a gerund is that when you place a noun or pronoun in front of it, you must make the word possessive. (The possessive pronouns are my, your, his, her, our, and their.)
I appreciate your helping me.
Does anyone object to my smoking? (Smoking is a gerund preceded by a possessive pronoun.)
Your complaining about the assignment will not change anything. (Complaining is a gerund preceded by a possessive pronoun.)
The plane’s arriving on time surprised me. (Arriving is a gerund preceded by a noun.)
Our success with this event depends on Roger’s taking charge of the finances. (Taking is a gerund preceded by a noun.)
Isn’t grammar fun?