If you are using it as a proper name yes. If you are using it as an adjective then no.
Yes, its a proper noun. Example: "He was one of the most influential Americans of his time."
American is always capitalized; citizen is not capitalized unless it forms part of the proper noun.
Example:
American citizen
American Citizen Services
American is a proper noun and should always be capitalized.
American does require capitalization.
Yes it should be.
Yes.
Yes.
No
The word citizen does not need to be capitalized.
Should breakfast be capitalized in a sentence
No, the word forecast should not be capitalized in a sentence.
Yes it should be capitalized.
Only when it forms part of the proper noun. Example: Organization of American Historians
No. It's written simply as "American citizen."
The word citizen does not need to be capitalized.
No, except at the beginning of a sentence because it is not a proper noun but American should always be capitalized.
Should breakfast be capitalized in a sentence
No, "transition process" should not be capitalized in a sentence unless it is the first word in the sentence or part of a title.
No, the word forecast should not be capitalized in a sentence.
No, except at the beginning of a sentence because it is not a proper noun but American should always be capitalized.
Yes it should be capitalized.
Yes it should be capitalized.
No, "secondary students" should not be capitalized in the middle of a sentence unless it is a proper noun or at the beginning of a sentence.
No, the word "fifteen" should not be capitalized in a date within a sentence unless it is the first word of the sentence.
Only when it forms part of the proper noun. Example: Organization of American Historians