I'm trying to get rid of some gaps in my knowledge of Pre-Int. grammar, so I'm working with a PET course book. And I've discovered some confusing things in some quite easy tasks...
1) The task is to use Present Perfect:
I ... (phone) my Granny and I ... (see) my cousins and I ... (say) goodbye to them.
My answer is:
I've phoned my Granny and I've seen my cousins and I've said goodbye to them.
Well, due to the keys I'm wrong and it should be said instead of have said:
I've phoned my Granny and I've seen my cousins and I said goodbye to them.
But why? I've searched for similar sentences and I've found a couple:
I have seen and heard this many times anecdotally.
I have seen and done a number of strange things.
Ok, it's clear here - we have only one subject, so something like "I've seen ... and said ..." is fine.
But in my example there are two subjects. So, is it still ok to use one auxiliary verb instead of two? What I want to understand is, is my sentence wrong or are they both possible?