句型转换。 1. I have to practice playing the violin first.(改为否定句) You ____ practice playing the violin first. 2. They can come over after 8 o'clock.(改为同义句) They _____ over after 8 o'clock. 3. Perhaps they will go there by electric bike.(改为同义句) _____ they will _____ their electric bikes to there, 4. Missing the train means waiting for an hour .(对画线部分提问) _____ _____ missing the train_____ ? 5. I can borrow this book from the library.(改为一般疑问句) _____ You _____ this book from the library?