Students often rush through theory to “finish” exercises. Instead, spend 60% of your time on understanding the why before the what . Another mistake: doing exercises once. Repeat them after 24 hours and again after a week. Spaced repetition fixes grammar into long-term memory.
I notice you’re asking for a PDF of Gramática: Teoria e Exercícios by Paschoalin and Spadoto (specifically page 34), followed by a request to “make a helpful essay.” gramatica teoria e exercicios paschoalin e spadoto pdf 34