It is usually appropriate to place a comma before "but." One should not use a comma after "but."
The comma always goes after the name in the beginning of a letter.
"Inc" is not a word, it's an abbreviation for "Incorporated," and there should be a comma before it.
Yes, you should capitalize the word after a comma in a sentence.
there's no colon, a comma comes after mrs smith
No, there should not always be a comma after the word "hopefully." It depends on the sentence structure. When "hopefully" is at the beginning of a sentence, it is often followed by a comma, but if it is used within a sentence, a comma is not necessary.
no
The use of a comma does not depend on the word, it depends on the sentence structure. At times a comma will follow 'which' and at other times it will not.
Depending on what the sentence is about you may use a comma before 'called';however, in some instances you may not be allowed to place a comma before the word called.
No, a comma is not needed before and after the word "again" if it is in the middle of a sentence.
no
Not necessarily. The comma indicates a pause in speech. Use a comma after "but" only to indicate a noticeable pause in speech. If there is no pause, there should be no comma.