My and His vs. Mine and His – Which is Correct?

The choice between “my and his” and “mine and his” hinges on whether you need a possessive adjective or a possessive pronoun. Use “my and his” when the phrase precedes a noun (e.g., “my and his project”). Use “mine and his” when the phrase stands alone as the subject or object, indicating joint ownership (e.g., “The project is mine and his”).

My and His or Mine and His – Which is Correct?

Both “my and his” and “mine and his” are grammatically correct, but they serve different functions within a sentence. The distinction lies in whether “my” or “mine” is required, which depends on its role as a possessive adjective or a possessive pronoun.

“My” is a possessive adjective. It always needs to be followed by a noun that it modifies. When you say “my and his [noun],” you are indicating joint possession of that specific noun. For instance, “my and his car” refers to a car owned jointly by “me” and “him.”

“Mine” is a possessive pronoun. It stands alone and replaces a noun phrase, indicating ownership without explicitly naming the noun again. When you say “mine and his,” the phrase acts as a unit signifying joint ownership or belonging. For example, “The car is mine and his” means the car belongs to both “me” and “him.”

The Best Trick to Remember the Difference

The simplest trick to remember the difference is the “Noun Test”:

• If you can immediately place a noun after the possessive word (e.g., “_____ car”), then you need a possessive adjective like “my.”
• If the possessive word stands alone, either at the end of a sentence or as the subject/object without a following noun, then you need a possessive pronoun like “mine.”

Apply this to the phrases: “my and his [noun]” versus “[noun] is mine and his.”

Word	Part of Speech	Meaning	Example
My	Possessive Adjective	Indicates possession, used directly before a noun.	“This is my and his shared project.”
Mine	Possessive Pronoun	Indicates possession, stands alone, replaces a noun.	“The responsibility is mine and his.”

How to Use My (in “my and his”)

“My” is a first-person singular possessive adjective. It is used to show that something belongs to or is associated with the speaker. In the phrase “my and his,” it functions as part of a compound possessive adjective phrase that modifies a subsequent noun. This construction emphasizes that the noun is jointly possessed or shared between “me” and “him.” It’s generally used in a straightforward, descriptive tone.

Example 1: “We combined my and his efforts to complete the challenging task.”

Example 2: “The decision to invest in the new venture was my and his joint idea.”

Example 3: “She admired my and his collaborative approach to problem-solving.”

What are the different forms of My?

“My” is a possessive adjective and does not have different forms in terms of tense, pluralization, or degrees of comparison like verbs, nouns, or adjectives. It is the fixed possessive form of the pronoun “I.” Its form remains constant regardless of the number or gender of the noun it modifies. For example, you say “my car” and “my cars.”

Etymology of the word My

The word “my” originates from Old English mīn, which was both a possessive adjective and a possessive pronoun. Over time, mīn evolved into “mine” when used as a pronoun and was shortened to “my” when used as an adjective before a vowel or consonant, specifically to avoid the awkwardness of “mine” before a noun. This distinction became more established in Middle English.

How to Use Mine (in “mine and his”)

“Mine” is a first-person singular possessive pronoun. Unlike “my,” it stands alone and functions as a noun, referring to something that belongs to the speaker without needing to state the noun explicitly. In the phrase “mine and his,” it forms a compound possessive pronoun that refers to a shared item or concept, acting as the subject or object of a sentence. This construction is common when discussing ownership or responsibility that rests with both “me” and “him.”

Example 1: “The responsibility for the project’s success is ultimately mine and his.”

Example 2: “She confirmed that the final design approval was mine and his to give.”

Example 3: “They agreed the victory was truly mine and his after years of hard work.”

What are the different forms of Mine?

Like “my,” “mine” is a possessive pronoun and does not have different forms in the sense of conjugation or declension. It is the absolute possessive form of the first-person singular pronoun “I.” Its form remains consistent whether it refers to a singular or plural possession. For instance, “The car is mine” and “The cars are mine.”

Etymology of the word Mine

“Mine” also derives from the Old English mīn. As mentioned, mīn functioned as both an adjective and a pronoun. In Middle English, a distinction emerged where mīn became “mine” when used as a pronoun (standing alone) and “my” when used as an adjective (before a noun). This evolution helped to clarify grammatical function and flow within sentences.

Related Concepts

Understanding broader grammatical concepts related to possession and pronouns can further clarify the correct usage of “my and his” versus “mine and his.”

• Possessive Adjectives: These words (my, your, his, her, its, our, their) always modify a noun, indicating who owns or possesses it. They must be followed by the noun they describe. For example, “Their house is large.”
• Possessive Pronouns: These words (mine, yours, his, hers, ours, theirs) stand alone and replace a noun phrase, indicating possession. They do not precede a noun. For example, “The large house is theirs.”

Examples from Media and Literature

• “The grand vision for the company was my and his, a dream we nurtured for years.” (Illustrates “my and his” modifying ‘vision’)
• “After a long deliberation, the final say on the matter was declared to be mine and his.” (Illustrates “mine and his” standing alone as the object of ‘to be’)
• “She brought her ideas, and I brought mine; together, our combined efforts felt like mine and his creation.” (Shows both “mine” alone and “mine and his” as a compound)
• “He shared his notes, and I shared my thoughts, making it clear that the project was truly my and his responsibility.” (Demonstrates “my” preceding ‘thoughts’ and “my and his” preceding ‘responsibility’)
• “Is this decision really mine and his to make, or do we need further consultation?” (Highlights “mine and his” as the subject complement)

Practice Exercises

Choose the correct word to complete the sentence.

1. The new business venture is solely ______ and his.
2. We combined ______ and his resources to launch the startup.
3. The credit for this innovative solution goes to ______ and his team.
4. Everyone agreed the best strategy was ______ and his proposal.
5. That difficult choice, in the end, was ______ and his to bear.

Answer Key

1. mine
2. my
3. my
4. my
5. mine

My Synonyms

Synonym / Related Phrase	Definition
Belonging to me	Indicating direct possession by the speaker.
Personal	Relating to or belonging to a particular person.
Individual’s	Pertaining to a single person.

Mine Synonyms

Synonym / Related Phrase	Definition
My own	Emphasizing direct and exclusive possession by the speaker.
My possession	An item or property owned by the speaker.
Belonging to me	Indicating direct ownership by the speaker, standing alone.

Frequently Asked Questions

Question 1: Can “my and his” or “mine and his” be used for intangible concepts like ideas or responsibilities?
Yes, absolutely. These phrases are not limited to physical objects. You can correctly say, “The idea was mine and his” or “My and his responsibility includes managing the budget.” The grammar rules for possessive adjectives and pronouns apply universally.

Question 2: Is the word order “his and my” or “his and mine” also correct?
Yes, grammatically, “his and my” and “his and mine” are also correct. Word order for compound possessives typically doesn’t change the grammatical function. However, it is common courtesy or convention in English to place “my” or “mine” (referring to oneself) last in a list of possessives. So, while “his and my project” is correct, “my and his project” is often preferred for politeness.

Question 3: What if there are more than two people involved in the possession?
When more than two people are involved, you would extend the list of possessive adjectives or pronouns accordingly. For example, for possessive adjectives: “my, his, and her project.” For possessive pronouns: “The project is mine, his, and hers.” The same rules for using adjectives before nouns and pronouns standing alone still apply.

Conclusion

The distinction between “my and his” and “mine and his” boils down to their grammatical roles: “my” is a possessive adjective always followed by a noun, while “mine” is a possessive pronoun that stands alone. Remembering the “Noun Test” – whether a noun immediately follows the possessive – is the most effective way to ensure correct usage. Mastering this nuance enhances clarity and precision in your communication. Pro Tip: Using the correct possessive form demonstrates a strong grasp of English grammar, which can significantly boost your professional reputation in both written and spoken contexts.