句型转换。 1. His father coughs badly, so he must stop smoking. (同义句转换) His father has a bad cough, so he must_______ _______smoking. 2. We don’t want to walk to the park. We will take a bus.(同义句转换) We will take a bus to the park _______ _______ walking. 3. You mustn’t walk on the lawn.(改为祈使句) ________ ________ on the lawn. 4. Having healthy eating habits is necessary for your health.(同义句转换) _________ is _________ for you ________ have healthy eating habit. 5. He looked after the old man.(同义句转换) He ________ for the old man.