supermarket does not have a capital letter unless it is the name of a supermarket like Asda or Tesco.
no
no, why the hell would it have a capital letter
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no..Bangkok is the capital of Thailand and Walmart is a business; a supermarket chain.
no.
To write "Capital H a", you would simply write the letter "H" followed by the lowercase letter "a".
To underscore a capital letter, you can use the underscore character "_" before the letter. For example, if you want to underscore the letter "A," you would write it as "_A". If you need to underscore multiple capital letters in a word, you would place an underscore before each one, such as "_A_B_C".
no
No it shouldn't be capitalized.
A capital letter is defined by being printed in a larger size or different form than its corresponding lowercase letter. Pretty much any letter which is printed in a larger format can be capital letter.
that would be Riga, the capital of Latvia.
No. Cauliflower cheese is not a proper noun and only the word cauliflower would have a capital on the first letter if it started a sentence.