There are three possible structures for a comments block.

1. When comments are displayed (like on detail pages, or on the main page when there are less than the maximum allowed amount of comments)

   comments header
     comments body (repeated)
   comments footer

2. When there are no comments at all

   no comments
   

3. When there are comments, but there are more than the maximum allowed number. (only applies when not on a detailed item page)

   too much comments
   

Inside these template-parts, some comments-related variables are available