"Eating vegetables was necessary."
Translation:Il fallait manger des légumes.
Is there a rule about which constructions require "de" and which ones "a" with the following infinitive, and which ones nothing? Forgive my lack of accents in the flolowing examples: "il etait necessaire DE manger..." but "il n'ya rien A faire" but "il fallait _ manger". Or must each one be memorized separately? Thanks.
This new system of being able to click on the words provided and not the keyboard is bordering on un-useable. Lesson after lesson the hints "provided" to not match the words underneath. Duo need to sort their system out. 909 days straight and I'm beginning to look around for other learning formats. It's getting ridiculous.