Question tag

Question tag เป็นกลุ่มคำที่ต่อท้ายประโยค เพื่อให้เป็นประโยคคำถาม 
The short questions that we put on the end of sentences – particularly in spoken English. 

Question tags are used to elicit confirmation or affirmation for a statement from the person one is talking to. This grammatical feature can sometimes provoke problems (especially for learners of English as a foreign language) as the question tag always has to be adapted to the previous part of the statement. This means it has to be grammatically in accordance with it. It can be different in other languages when only generic question tags are used.

Rules
1. In positive sentence including the meaning, a negative sentence is needed. On the other hand, in negative sentence including the meaning, a positive sentence is needed. (There may be other combinations depending on meaning and pronunciation)
2. Common in spoken language
3. Use personal pronoun (he, she, it, we etc.) which refer to the subject of sentence.
4. Tense in the question tag is same as tense in the statement
5. If an auxillary verb (be, have, do etc) or modal verb (must, can etc), it will be used in the tag.
6. If a main verb is used, the question tag is formed with 'do'.
7. If the statement is request, 'will' or 'would' are used.
8. If the request includes 'lets', 'shall'is used.
9. If 'there is' or 'there are' or 'there were' etc, 'there' will be applied to the question tag.
10. If the statment includes 'I', the question tag is formed with 'aren't I'



Example

• “You are hungry, aren’t you?”
• “He is from Scotland, isn’t he?”
• “She plays the piano, doesn’t she?”
• “They have good connections to that company, don’t they?”

• “She isn’t very happy about her new job, is she?”
• “He usually cannot visit you on weekends, can he?”
• “We are not allowed to leave, are we?

• “Your neighbors never use their car, do they?”
• “She never came back again, did she?”
• “My friend hardly does his homework, does he?”
• 
  
• “The house you bought was built in 2003, wasn’t it?”
• “We have got a beautiful garden, haven’t we?”
• “The instructions must be followed, mustn’t they?”
• 
  
• “We spent too much money yesterday, didn’t we?”
• 
  
• “Pass me the sugar, would you?”
• “Don’t be late, will you?”
• 
  
• “Let’s go shopping, shall we?”
• 
  
• “There weren’t a lot of things left at the sale, were there?”
• 
  
• “I’m very lazy, aren’t I?”

If the sentence expresses a command, request or prohibition, then the question tag is used form will you. But if the sentence stating an invitation, then the question tags used are Shall We. This invitation form usually use Let’s.
Example :

Commands/ Requests Question Tag
Stop over there, Will you?
Close the door, please, Won’t you?
Have a sit, Won’t you?
Help me, please, Would you?
Let them go, Will you?
Let us take a rest, Would you?
Let’s take a rest, Shall we?
Let’s go swimming, Shall we?
Have another tea, Won’t you?
Don’t tell them about it, Won’t you?
Don’t talk too loudly, Will you?
Don’t bother me, Would you?

1 Close the door, will you?
2 Give me a pencil, can you?
3 Add my name to the list, would you?
4 Be quiet for a minute, will you?
5 Send me the confirmation by email, could you?
6 Wait for me, will you?