It depends on the context. You could use it when using "such" in place of "for example", but it would not be mandatory. An example is: "I like sweet foods, such as chocolate and biscuits." However, the sentence functions equally well without the comma. You would not need it in the following context: "I think the loss of rainforests is such a waste."
Yes, the comma is typically used before "such" when it introduces a non-restrictive clause. For example, "She enjoyed French cuisine, such as Croissants and escargot."
no
no
I do not use a comma before and after that word, therefore you will not see it in any sentence I have written.
You add the comma before the connector.
after
Yes, you should use a comma before "Jr." when writing a person's name to separate the person's last name from the suffix. For example, "John Smith, Jr."
The comma should come before the word "but" when it is used to separate two independent clauses. For example: "I wanted to go to the store, but it started raining."
before
No, a comma is not necessary.
no
no
no
You would use a comma before it. Xerox, Inc.
I do not use a comma before and after that word, therefore you will not see it in any sentence I have written.
You add the comma before the connector.
if the main or most important part is before the main parts you use a comma, but if it is after then no comma
In English, use a comma before someone's name when directly addressing them in a sentence or letter. For example: "John, could you please pass me the salt?"