No, ‘my’ is not a preposition. It is a possessive pronoun used to indicate ownership or association.
In English, prepositions are words that usually describe relationships between other words in a sentence, often indicating direction, location, or time, such as ‘in’, ‘on’, ‘at’, ‘by’, and ‘with’. ‘My’, on the other hand, specifically modifies a noun to show that the noun belongs to the speaker.
For example, in the phrase ‘my book’, ‘my’ shows that the book belongs to me. Understanding the function of different parts of speech like pronouns and prepositions is essential for constructing clear and effective sentences.