Rejoinders are quick responses to show that you are interested or paying attention.
(Oh) Really?
That’s interesting.
Is that right?
Note how rejoinders are used in the following situations.
1. I just got a new job.
Oh really? That’s great!
2. I lost my wallet yesterday.
Oh really? That’s too bad.
Rejoinders may also take the form of follow-up questions. Note how they are used in the following situations.
1. I just bought a new car.
You did?
He is?
You are?