If you want to add extra information that is not important to a sentence, the information should have a comma before and after it.

The giraffe, which comes from Africa, has a very long neck.
• Audrey, who is very tired, is going on holiday next week.
(The commas before and after who is very tired are needed because this information is not important for the sentence. It is extra information)
• Our hotel, which only had eight rooms, was fantastic.
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Remember: Extra information with commas.
Re-write the sentences CAREFULLY and add commas where necessary.
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Remember: Extra information with commas.
Re-write the sentences CAREFULLY and add commas where necessary.
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Question 1 of 7
1. Question
Ms Riley who was a journalist was found dead in her bed.
Correct
Ms Riley, who was a journalist, was found dead in her bed.
Incorrect
Ms Riley, who was a journalist, was found dead in her bed.
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Question 2 of 7
2. Question
My colleague who is a great reader told me about a book he’d just read.
Correct
My colleague, who is a great reader, told me about a book he’d just read.
Incorrect
My colleague, who is a great reader, told me about a book he’d just read.
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Question 3 of 7
3. Question
I gave the money which I found to my wife.
Correct
I gave the money which I found to my wife.
The phrase . . . which I found . . . is necessary to tell us which money.Incorrect
I gave the money which I found to my wife.
The phrase . . . which I found . . . is necessary to tell us which money. -
Question 4 of 7
4. Question
The man who you met yesterday lost all his money last year.
Correct
The man who you met yesterday lost all his money last year.
Incorrect
The man who you met yesterday lost all his money last year.
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Question 5 of 7
5. Question
Teachers who teach English should get more money.
Correct
Teachers who teach English should get more money.
The phrase . . . who teach English. . . is necessary to tell us which teachers.Incorrect
Teachers who teach English should get more money.
The phrase . . . who teach English. . . is necessary to tell us which teachers. -
Question 6 of 7
6. Question
Skype which started in 2003 is a great way to speak with your friends.
Correct
Skype, which started in 2003, is a great way to speak with your friends.
Incorrect
Skype, which started in 2003, is a great way to speak with your friends.
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Question 7 of 7
7. Question
Websites which help you learn English are often covered with annoying adverts.
Correct
Websites which help you learn English are often covered with annoying adverts.
Incorrect
Websites which help you learn English are often covered with annoying adverts.
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Remember: Extra information with commas.
The boat, which is blue and white, is floating.
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Remember: Extra information with commas.
The chair, which is red, is very small.
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Which or that?
That is used when important information is added. Which is used when the information added is not important. (1:45)When to use a comma before and or but?
When two simples sentences are joined together using and or but you should put a comma before and or but. (1:45)Vocabulary Video Lesson: Extreme Sports
This vocabulary lesson will help you define exciting, scary, terrifying, incredible, insane, adrenalin, safety equipment, humdrum and sissy. (8:00)