Final answer:
To convert the sentence into a negative form, you could say, "I do not like someone pulling my shirt," replacing "loathe" with "do not like" to convey negative sentiment.
Step-by-step explanation:
To change the sentence "I loathe someone pulling my shirt" into a negative form, you'd restructure it to include a negative verb phrase. An example of such a rephrased negative sentence might be: "I do not like someone pulling my shirt." Here, the verb "loathe" is replaced with the phrase "do not like" which conveys a negative sentiment without using the strong word "loathe." Remember that when creating negative statements, pay close attention to the tone you wish to maintain, as different words carry different levels of intensity and connotation.