句型转换。 1. The boy started playing football in 2004. (就画线部分提问) _______ ________the boy _______playing football? 2. They stayed in Beijing for 5 years .(就画线部分提问) _______ _______ _______ they _______in Beijing? 3. I started learning English three years ago. (改为否定句) I _______start learning English three years ago. 4. The teachers ask the students not to talk in class. (改为同义句) The teachers ask the students to_______ ________ in class. 5. He is going to be a basketball playe r when he grows up. (就画线部分提问) _______ is he going to _______ when he _______ up?