No, typically you do not use a comma after the word "oh" if it is being used at the beginning of a sentence. If "oh" is being used in the middle of a sentence to express surprise or emotion, it is usually set off with commas.
Often yes, but not always. "Oh!" could be the whole exclamation.
No.
You can put a comma before or after just about any word if the sentence structure requires it. If the sentence structure does not require it, it may be permissable to use a comma to assist in clarity and avoid confusion. Otherwise, don't use a comma. Have I confused you yet? Using a comma does not depend on the word, it depends on the structure of the sentence.
No, a comma is not always necessary after "oh." It depends on the context of the sentence and whether the pause created by the "oh" requires a comma for clarity.
It is not proper to use a comma after the word "thanks" in the phrase "thanks again."
Often yes, but not always. "Oh!" could be the whole exclamation.
No. After the word and comma can not be used, as it is grammatically inappropriate to use comma after conjunctions such as and, which are called coordinate conjunctions.
There is no word in English that necessarily requires a comma.
NO
Not necessarily. There is no word in English that requires a comma.
no
no
No.
No
no
no
In many cases, the word 'however' is followed by a comma. The problem with the word is that one must be careful not to over use a comma. However the word is used,(note that there is no comma used in this connection) the word itself frequently does not need a comma as an automatic punctuation.However, (meaning 'on the other hand') phrasing will most often determine if the word is followed by a comma. These two instances here are examples of when to use or not use the comma as punctuation for this word. When the word is used as a substitute for the phrase 'on the other hand', it is most often followed by a comma.