Student or Learner
Why we used Does in the first question and Is in the second?
My cousin lives next door to Brad Pitt.
Does he? Wow!
My grandfatherís learning Italian.
These are question tags. Your examples (a positive tag following a positive statement) are less common, but they are used to express interest or ask for confirmation.
So you like working here, do you?
In general to form a question tag we use:
*the correct auxiliary verb, e.g. do/does for the present, will/wonít for the future, etc.
*a pronoun, e.g. he, it, they, etc.
*a negative tag if the sentence is positive, and a positive tag if the sentence is negative.
Question tags are often used to check something you already know is true.
Your nameís Maria, isnít it?
You arenít happy, are you?
The match finishes at 8.00, doesnít it?
They donít smoke, do they?
She worked in a bank, didnít she?
He didnít like the film, did he?
We've met before, havenít we?
She hasnít been to Rome, has she?
Youíll be OK, wonít you?
You wonít tell anyone, will you?
If the intonation of the tag rises, it may be a genuine question, or a request for information.
If the intonation of the tag falls, the speaker expects agreement.
Hope that helps.