Because I is a title for someone and basically a name but "a" is not.
"a" is for any kind of thing/object.
In English, the pronoun "I" is always capitalized because it refers to oneself as an individual. On the other hand, the letter "a" is not capitalized because it is a common article with multiple uses and does not indicate a specific person or thing.
Capitalize the first word in a sentence. Capitalize proper nouns, such as the names of people and places. Capitalize the pronoun "I." Capitalize the first word of a quote. Capitalize days of the week, months, and holidays. Capitalize the titles of books, movies, and songs. Capitalize the first, last, and important words in titles.
In "Yours truly," you capitalize the first letter of each word if you are using it as a complimentary close in a letter, as it is a formal sign-off.
No, you do not capitalize the second word in the complimentary closing.
Yes, you should capitalize "Hydrocodone" as it is a proper drug name.
It is not necessary to capitalize pronouns in titles unless they are at the beginning of the title.
no, but you do capitalize mum
In a list, you would typically capitalize the first word of each item, proper nouns, and the first word after a colon if it introduces a complete sentence.
You capitalize the first A but not the last a.
No, you do not capitalize the word drama.
You capitalize Huntington
do you capitalize the word protestant
Country is capitalized when it is used as part of a proper noun referring to a specific country or when it begins a sentence. For example, "I am traveling to the United States" or "Country music is popular in the southern states."
do you capitalize roaring twenties
Capitalize challah bread
You would not capitalize it. cotton gin
yes, you do capitalize The Black Hills.
Yes you do capitalize Relief Money