Yes, it is common to use a comma after the word "upon" when it is used at the beginning of a sentence to introduce a new idea or point. For example: "Upon arriving at the airport, we realized our flight was delayed."
No
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.
Yes, it is proper to use a comma after "Thanks" in "Thanks again" as it separates the expression of gratitude from the word "again."
"Therefore" is a transitional word and traditionally a comma is placed after the word to indicate the transition. For example: The economy of the United States was historically based upon agriculture; therefore, a proposed tariff on exported cotton was extremely unpopular with Congress.
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.
You can, depending on the context.For example: Upon returning to my house, I discovered I had left the stove on.
Yes, typically a comma is placed after the word 'once' when it is used at the beginning of a sentence to introduce a dependent clause. For example: "Once, I finish my homework, I will go out to play."
There is no word in English that necessarily requires a comma.
The comma goes after the word 'because' when it is used at the beginning of a dependent clause, separating the clause from the main clause. For example: "I stayed inside, because it was raining."
NO
No
Not necessarily. There is no word in English that requires a comma.
Yes, a comma should be used after "which" when it introduces a nonrestrictive clause in a sentence.
no
no
No