Tu : is a pronoun (je,tu,il/elle/on,nous,vous,ils) and is only used before a verb. ex: Tu manges des tomates (you are eating tomatoes) toi: when you want to say "you" and there is no verb before or after. Toi, tu pars à 10h (You, you are leaving at 10am) I hope hope this makes sense to you (i am bilingual so this should be right lol)
Complete sentences. Model When I eat salad, I lose weight (lose weight). 1. 11 (pass) his exam. 2. We (finish) our lunch. 3. When children eat a lot of fries, they (grow)! 4. You (choose cheese or dessert? 5. (think) about the problem. 6. My children (grow up) very quickly (fast). 7. You never (obey) me (never)!