are the following sentences correct?

[njanja]

a) He has put on weight,grown a beard and changed.
b) He has put on weight,has grown a beard and has changed.

a) They have been sitting,talking and having a good time.
b) They have been sitting,have been talking and have been having a good time.

I think the two 'a' examples are correct but is it possible to use 'has/have' and 'has/have been' before every verb in a sentence?

[Saxonlight]

You are correct.

You could use the B versions but people may look at you a little strangely.

The A versions are the most natural way of saying this.

Chris
http://www.hearseesay.com