Peace be upon you
well,I decided to tackle another point which is so important,and it’s possible to meet it during the bac exam
that point is how to derive a noun or an adjective from a verb and vice versa
there is no exact rule,the only rule is to learn ,learn and learn the common words by heart
I’m going to provide you with some of them,that is to say the common ones
verb:to teach,noun:teaching,adjectieve:taught
verb:to know,noun:knowledge,adjective:knowledgeable
verb:to involve,noun:involvement,adjective:involved
verb:to believe,noun:belief,adjective:believable
verb:to respect,noun:respect,adjective:respectful
verb:to decide,noun:decision,adjective:decisive
verb:to vary,noun:variety,adjective:various
verb:to economize,noun:economy,adjective:economical
verb:to civilize,noun:civilization,adjective:civilized
verb:to invent,noun:invention,adjective:inventive
verb:to enrich,noun:enrichement,adjective:enriching
verb:to devote,noun:devotion,adjective:devotional
verb:to improve,noun:improvement,adjective:improved
verb:to dedicate,noun:dedication,adjective:dedicated
if you have something to add,you are most welcome
best of luck
RABI YWAF9ek inchalleh 
