Chapter 12.1 highlighted my issues with “de", as in the writing task, I kept getting it wrong ("de" when “des” was needed and vice versa).
I am clear on “beaucoup de” - always “de”: beaucoup de coutumes / beaucoup de vin.
But then again with “la plupart” it changes: “la plupart des coutumes" / "la plupart de la journee”.
With “quel type de” it doesn't change.
Is there a general rule I can follow? Or do we need to learn each expression individually?