Sounds like you need to read the manual to understand how ArchiCAD's roof tool works or better still go through the tutorials that Graphisoft have provided
http://www.graphisoft.com/products/archicad/training_guides/
There isn't anything difficult about the roofs you have shown in the photos above and I'm sure if you go through the tutorials you will be able to model them very quickly
here's my stab at it last Friday lunchtime
All the best
AC versions 3.41 to 25 (UKI Full 5005).
Using AC25 5005 UKI FULL
Mac OSX 10.15.7 (19G2021) Mac Pro-2013 32gbRam AMD FirePro D500 3072 MB graphics