No. An adverb modifies a verb, adjective, or another adverb. A comma is a form of punctuation.
true
True
This statement is true.
Semicolon
Both types of clauses use the same type of punctuation, which depends on where they are in the sentence, how long they are, and whether there is some reason to set them off with particular punctuation (dashes, parentheses, semicolons, commas).
c. semicolon
A comma comes after (or before, or before and after) unfortunately, in most cases.Unfortunately, I did not get the job.She was, unfortunately, already married.I was too late, unforunately.
A semicolon is a punctuation mark that is used between clauses of a compound sentence when a conjunction is not used.
None, open punctuation means there is no punctuation after the salutation or the complimentary close.
A mixed punctuation style typically uses a colon after the salutation.
Grammar Diction Tone Punctuation