按要求完成下列句子。
1. I am playing the piano now. (用yesterday改写句子)
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2. Lucy did her homework at home. (改为否定句)
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3. I went to school by_bike yesterday. (对画线部分提问)
________ ________ you go to school yesterday?
4. They played football last Sunday. (改为一般疑问句,并作否定回答)
—________ they ________ football last Sunday?
—________,________ ________.
5. was, driver, before, my, a, grandfather. (连词成句)
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