Question tags are more in spoken English than in written English. Sometimes we use a question tag when we want the other person to respond to our comment. It can help a conversation flow more.
"It's a nice day, isn't it?"
Examples of question tags:
- You're from France, aren't you?
 - Yesterday was really interesting, wasn't it?
 - I don't need to finish this today, do I?
 - The bus stop is on Princes Street, isn't it?
 
Review how to form a 'question tag' in the video.
Now try the quiz.
Are the sentences correct or incorrect?
- Lindsay eats cake, eats she?
 Incorrect. Lindsay eats cake, doesn't she?
- All the students were happy, weren't they?
 Correct.
- You can hear me, couldn't you?
 Incorrect. You can hear me, can't you?
- You can't hear me, can you?
 Correct.
- Greig's a teacher, is he?
 Incorrect. Greig's a teacher, isn't he?