Exercise 1. Rewrite each sentence as a positive or negative sentence, or a questin, according to the instruction 1. I have visited this city many times(negative) 2. Has he changed his telephone munber?(positive) 3. We have learnt French for three months(interrogative) 4. Minh has never seen Giac Lam pagoda(positive with"already") 5. You have visited Dam Sen amusement park (interrogative with "ever") 6. It has rained(positive with"just") 7. I have made a shopping list(negative with "yet") 8. The weather has been awful(interrogative) 9. Have you opened your letter?(negative with"yet") 10. The students have not finished the exam yet(interrogative)