Знаки препинания: запятая

Commas: 12 Examples

1) In a list:
Robbie likes writing blogs, making videos, and drawing illustrations to go with his blog posts.
2) Between 3 or more adjectives or adverbs:

The MyEC photo gallery is an educational, colourful, moderated space for English practice.
3) With two adjectives:
The Learning English Video Project is an informative, entertaining documentary.
4) With numbers:
The 50,000th member of MyEC was Mogal Satish.
5) For addresses or dates:
Our 50,000th member arrived on December 30, 2011. He was from Maharashtra, India.
6) For direct speech:
JK said, "Just ignore that chatter. He's a troublemaker."
"Thank you," the new member said. "Can you show me how to use the ignore button?"
7) Before a coordinating conjunction:
Tara was away from the Audio Speaking Group for a while, but Ohnie and others filled in.
8) For parenthetical elements:
Josef, who is the founder of EnglishClub, posted a great photo from Vietnam.
9) After an introductory element:
After creating a new photo challenge, Nadiyah invited her friends to join.
10) With sentence adverbs:
Our 20,000th member, not surprisingly, was overwhelmed by our welcome messages.
11) With adverbial clauses:
a) If ESL Teacher Lisa Jo moderates a chat on MyEC, many chatters will participate.
b) Many MyEC chatters will participate if Lisa Jo moderates the chat. (no comma)
12) Run-on sentence correction:
Error found: It seems that you have good news about your work, you are clever, and you will succeed.
Correction: "It seems that you have good news about your work. You are clever, and you will succeed."
Note: There are always exceptions to language rules. You will find commas used in other ways. It's always best to learn the basic rules before you learn how to break them.
http://www.englishclub.com/writing/punctuation.htm