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Here are the rewritten sentences: 1. This is the most delicious cake I've ever tasted. > I've never tasted a cake as delicious as this. 2. I've never met any more dependable person than George. > George is the most dependable person I've ever met. 3. There isn't anybody as kind-hearted as your mother. > Your mother is the kindest-hearted person I know. 4. There is no better teacher in this school than Mr John. > Mr John is the best teacher in this school. 5. Have you got any bigger than that one? > Is this the biggest you have? However, note that a more natural way to rephrase the last sentence would be: > Do you have one bigger than that? Here are the rewritten sentences: 1. My house is bigger than your house. -> Your house is smaller than mine. 2. The black car is cheaper than the red car. -> The red car is more expensive than the black car. 3. This film is more interesting than that one. -> That film is less interesting than this one. 4. My kitchen is smaller than yours. -> Your kitchen is bigger than mine. 5. My grandmother is older than everyone in my family. -> My grandmother is the oldest person in my family. 6. No one in my class is as tall as Tam. -> Tam is the tallest person in my class. 7. I can't cook as well as my mother. -> My mother can cook better than I can. 8. He does not play tennis as well as Jack. -> Jack can play tennis better than him. 9. I did not spend as much money as you. -> You spent more money than I did. 10. I don't think this book is expensive as it is. -> This book is less expensive than I thought. 11. He is the tallest boy in his class. -> No one in his class is taller than him. 12. This is the most interesting film of all. -> No other films are as interesting as this one. 13. No cars in the world are more expensive than Japanese ones. -> Japanese cars are the most expensive in the world. 14. This exercise is easier than that one. -> That exercise is not as easy as this one. 15. He drives more carefully than Jack does. -> Jack drives less carefully than him. 16. No one in the group plays better than he. -> He can play better than anyone in the group. 17. No hotel in the city is as comfortable as this. -> This hotel is the most comfortable in the city. 18. Other oceans in the world aren't as large as the Pacific one. -> The Pacific Ocean is the largest in the world. Here are the rewritten sentences using modal verbs in passive voice: 1. Her office can't be used at the moment. 2. My work has to be finished now. 3. Your task must be done. 4. Poor women should be offered more help by governments. 5. Something has to be done before it's too late. 6. 500$ may be earned by my uncle a day. 7. The fish might have been caught. 8. The company will be sued for wage discrimination. 9. The dress could have been washed. 10. Many flowers can't be picked. Please go ahead and provide the sentences you'd like me to change to the passive voice.