This is the place to post questions and discussions on usage and style. The members of the Wordwizard Clubhouse will also often be able to help you to formulate that difficult letter.
Are these sentences correct:
1) I saw Pete, Tom, Harry.
2) Pete, Tom, Harry came here yesterday.
3) He acted under the influence of Pete, Tom, Harry.
4) He acted under the influence of Pete, of Tom, of Harry.
In all cases the last comma of the list needs to be replaced with "and" or with "or".
- I saw Pete, Tom and Harry
- I saw Pete, Tom or Harry
I'm puzzled therefore I think.
4) is quite outlandish.