The capitalization of "mother-in-law" depends on its context within a sentence. Let's break down the rules and exceptions to ensure you always use it correctly.
When to Capitalize "Mother-in-Law"
You capitalize "mother-in-law" when it:
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Begins a sentence: Just like any other noun, "Mother-in-law" requires capitalization when it starts a sentence. For example: "Mother-in-law visits are always eventful."
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Is part of a proper name or title: If "mother-in-law" is part of a formal name or title, it should be capitalized. For instance: "I sent a thank-you note to my Mother-in-Law, Susan Smith." Note that in this example, only "Mother-in-Law" is capitalized, not "Susan Smith" as that’s a separate name.
When NOT to Capitalize "Mother-in-Law"
You do not capitalize "mother-in-law" when it:
- Is used as a common noun: In most cases, "mother-in-law" functions as a common noun, describing a family relationship. Therefore, it’s lowercase: "My mother-in-law baked me a delicious cake."
Frequently Asked Questions (FAQ)
Addressing common queries around the capitalization of "mother-in-law" can further clarify this grammatical point.
Is "mother in law" capitalized?
No, "mother in law" (without the hyphen) is not correctly capitalized unless it begins a sentence. The hyphenated version, "mother-in-law," is the preferred and grammatically correct form.
Should "mother-in-law" be capitalized in a title?
It depends on the title. If it's part of a formal title (e.g., a dedication in a book), it might be capitalized. However, in most informal titles or headings, it's generally lowercased.
What about other family relationships?
The capitalization rules for "mother-in-law" apply similarly to other family relationship terms like "father-in-law," "brother-in-law," "sister-in-law," etc. They are capitalized only at the beginning of a sentence or when part of a proper name/title.
Is there a difference in capitalization between British and American English?
No significant difference exists in capitalization rules for "mother-in-law" between British and American English. Both follow the same general guidelines outlined above.
Conclusion: Consistency is Key
Remembering the basic rule – capitalize only at the beginning of a sentence or as part of a proper noun – is the best way to ensure correct capitalization of "mother-in-law" in your writing. Consistency in your writing style is crucial for clear and professional communication.
