Present perfect simple or continuous?

Present perfect simple or continuous?

1. Emphasis on result or progress?

   • Result
     • Present perfect simple
   • Progress
     • Present perfect continuous
       • Time
       • I have been reading for 2 hours.

2. Talking about number of things or length of time?

   • Number
     • Present perfect simple
       • I have read the book. I have read 5 pages.
   • Time