Array of Comments

Good afternoon,
I can't comprehend the composition of the array code for comments and plus, I'd like to have the composition of the code to meet the conditions specified in the list, then you can set, among other things, in the byline: "Homepage" - in the byline: "Multi Post Pages" and in the byline: "Single Post Pages":

* No comment.
* 1 Comment.
* %Comments (with the power to enter anything after 'Comments', if the number of comments is higher than 1 and less or equal to n).
* %Comments (with the power to enter anything after 'Comments', if the number of comments is higher than n.
* Comments are closed.


I hope I have been clear.
Thank you.
Sincerely, Andrea.