Duolingo is the world’s most popular way to learn a language. It’s 100% free, fun and science-based. Practice online on duolingo.com or on the apps!
— Read on en.duolingo.com/
These questions were adapted from this site. I formatted them for pdf printing and added some instructions.
ESL Writing Exercises and Printable Lessons: Transition worksheets, ESL writing activities, error correction worksheets, and much more!
— Read on www.stickyball.net/esl-writing-exercises-and-activities.html
Second Conditional -Rules and Examples- (English Grammar) – YouTube
— Read on m.youtube.com/watch
LearnEnglishFeelGood.com – English grammar exercises | English grammar training, practice
— Read on www.learnenglishfeelgood.com/esl-english-grammar-exercises.html