Always Capitalize:
* The first word of a sentence: "The cat sat on the mat."
* Proper nouns: These are names of specific people, places, or things.
* People: John, Mary, Queen Elizabeth
* Places: London, Mount Everest, the Pacific Ocean
* Organizations: The United Nations, Google, NASA
* Days of the week: Monday, Tuesday, Wednesday
* Months of the year: January, February, March
* Holidays: Christmas, Thanksgiving, Ramadan
* Specific events: World War II, the Super Bowl
* Titles: President Biden, Doctor Smith, Professor Jones
* Titles of books, movies, articles, and other works: *Pride and Prejudice*, *The Avengers*, "The Importance of Being Earnest"
* Abbreviations of titles: Dr., Mr., Mrs., Ms.
* Nationalities and languages: American, English, French, Spanish
* Religions and deities: Christianity, Islam, God, Allah
Sometimes Capitalize:
* The first word in a line of poetry: This is a stylistic choice.
* The first word after a colon if it starts a complete sentence: "The rule is simple: Follow the instructions carefully."
* The first word of a direct quote: "He said, 'Let's go.'"
* Words that refer to specific geographical locations: The West Coast, the Midwest, the South
Never Capitalize:
* Common nouns: These are general names for people, places, or things. (e.g., cat, city, chair)
* Articles: a, an, the
* Prepositions: of, to, by, for, with, etc.
* Conjunctions: and, but, or, so, yet, etc.
Important Notes:
* Consistency: Be consistent with capitalization within a piece of writing.
* Context: The specific context of a word might determine whether or not it's capitalized.
Let me know if you'd like more specific examples or have any other questions!