She's really friendly/nice.
I really like/love them.
That's really interesting.
It's a really difficult decision.
I really like my lessons, [the] teacher and my new friends. (Skills for Life (Entry 1); A1; Polish)
I really have to call Ursula this week.
You really shouldn't worry.
I really need to study. (Key English Test; A2; Portuguese)
He isn't really angry - he's just pretending.
You don't really expect them to refuse, do you?
She said she was twenty-eight, but really she's over thirty.
The first lesson was about the present tense and wasn't really difficult for us. (Preliminary English Test; B1; French)
"So was the food good?" "Not really."
"Did you like him?" "Not really."
"Apparently she's leaving." "Really? When?"
"She's agreed to try parachute jumping with me." "Really? Do you think she'll do it?"