My salary is high, but yours is higher. My salary isn't as high as yours.
You know a bit about cars, but I know more. You don't know about cars as much as me.
We are busy today, but we were busier yesterday. We aren't as busy as yesterday.
I still feel bad, but I felt a lot worse earlier. I don't feel as bad as earlier.
Our neighbours have lived here for quite a long time, but we've lived here longer. Our neighbours haven't lived here as long as us.
I was a little nervous before the interview, but usually I'm a lot more nervous. I wasn't as nervous as usual.
Myślę że pomogłam (poprawnie)