Change Passive Voice to Active Voice. writing sentences in passive voice is discouraged b/c it can obscure the subject of the sentence & confuse the reader. It also usually creates a wordy and awkward sentence construction.
Helping Verbs Sign for grammar notebooks
English Grammar solution: Structure English All Tense, Structure of the Tense.
Mappa_Grammatica 2 by ELC Language Centre - issuu
The difference between FOR and SINCE in English - English Grammar Rules