Extra practice: verb "to be"
- https://www.allthingsgrammar.com/uploads/2/3/2/9/23290220/atg-worksheet-beverbpast2.pdf
- https://www.perfect-english-grammar.com/past-simple-exercise-1.html
- https://www.perfect-english-grammar.com/past-simple-exercise-2.html
- https://www.perfect-english-grammar.com/past-simple-exercise-3.html