They are mainly used in speech when we want to:
a. confirm that something is true or not, or
b. to encourage a reply from the person we are speaking to.
Question tags are formed with the auxiliary or modal verb from the statement and the appropriate subject.
A positive statement is followed by a negative question tag.
- Jack is from Spain, isn't he?
- Mary can speak English, can't she?
When the verb in the main sentence is in the present simple we form the question tag with do / does.
- You play the guitar, don't you?
If the verb is in the past simple we use did.
- They went to the cinema, didn't they?
- She studied in New Zealand, didn't she?
When the statement contains a word with a negative meaning, the question tag needs to be positive
- He hardly ever speaks, does he?
- They rarely eat in restaurants, do they?
Some verbs / expressions have different question tags. For example:
Let's - Let's go to the beach, shall we?
Have got (possession) - He has got a car, hasn't he?
There is / are - There aren't any spiders in the bedroom, are there?
This / that is - This is Paul's pen, isn't it?
IntonationWhen we are sure of the answer and we are simply encouraging a response, the intonation in the question tag goes down:
- This is your car, isn't it?(Your voice goes down when you say isn't it.)
Question Tags Free English Grammar Game - Juegos de Gramática Inglés