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EXERCISE 16. Simple present verbs: using final -S/-ES. (Charts 1-4 and 1-5) Directions: Undecline the verb in each sentence. Add final -s/-es to the verb if necessary. Do not change any other words. 1. A dog bark. barks 2. Dogs bark. OK (no change) 3. Wood float on water. 4. Rivers flow toward the sea. Homework 5. My mother worry about me. 6. A student buy a lot of books at the beginning of each term. 7. Airplanes fly all around the world, 8. Mr. Wong teach Chinese at the university, 9. The teacher ask us a lot of questions in class every day. 10. Mr. Cook watch game shows on TV every evening 11. Music consist of pleasant sounds. 12. Cars usually sleep eighteen hours a day. 13. The front page of a newspaper contain the most important news of the day. 14. Water freeze at 32F (0C) and boil at 212F (100C). 15. Mrs. Taylor never cross the street in the middle of a block. She always walk to the corner and use the pedestrian walkway. 16. Many parts of the world enjoy four seasons: spring, summer, autumn, and Each season last three months and bring changes in the weather