按要求转换句型。
1. They are having a PE lesson. (对画线部分进行提问)
                                                                            
2. Jump up and down ten times.(改为否定句)
                                                                            
3. We have four lessons in the morning.(对画线部分进行提问)
    _                                                                          
4. My sister often takes photos on Sunday.(改为一般疑问句并作否定回答)
                                                                              
5. I can put the grape on my head.(改为祈使句)
                                                                            

【考点】祈使句,现在进行时，现在分词,一般疑问句,疑问词组

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