句型转换。 1. I think they will come tonight. (改为否定句) I _____ think they _____ come tonight. 2. I have also been to Shanghai. (改为否定句) I _____ been to Shanghai, _____ . 3. He did his homework last night.(改为一般疑问句) _____ he_____ his homework last night? 4. It's very delicious food.(改为感叹句) _____ _____ the food is ! 5. My mother will come home in three days . (对划线部分提问) _____ _____ will your mother come home?