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 player when he grows up.  (就画线部分提问)
   _______ is he going to _______ when he _______ up?