Correct the mistakes in the sentences. In some sentences, there is more than one mistake. 1 Elephants are stronger that humans. 2 Have you ever be late for school? 3 You should to your homework before dinner. 4 I think dogs are more friendlier than cats. 5 My friend going to help his father this summer. 6 We haven't to wear a uniform at my school. 7 This is the most big city of my country. 8 I'm going visit my grandparents on August.