You can invite Keith to the party, but please don't ask that friend of his.
She's very hard-working but not very imaginative.
She's not only a painter but also a writer.
I think it's true, but then, I'm no expert.
There are eight rooms but the best one is my bedroom, because there are a lot of books. (Key English Test; A2; Italian)
I was going to go to his party, but I was ill.
I'm really sorry I haven't written for so long, but I was very busy last week. (Preliminary English Test; B1; Italian)
Everyone but Andrew knows.
This car has been nothing but trouble - it's always breaking down!
I'm free all days of the week but Monday and Wednesday. (Key English Test; A2; Spanish)