the girl is playing the piano at the party 改成提问句,回答,否定句,一般疑问

the girl is playing the piano at the party 改成提问句,回答,否定句,一般疑问 The girl is playing the piano.（改为否定句） The girl ____ ____ the Sam is good at playing the piano.(改成同义句）Sam ?the piano? the girl is good at playing the piano改为同意句the girl_ _ _piayi The orange is sour改成否定句,一般疑问句,肯定回答,否定回答,对sour提问 the boy is playing basketball 否定句、一般疑问句、肯定回答、否定回答、对划线部分提问是什么 Sam is good at playing the piano.改为同义句 The mother shouted at the little girl.改成否定句 mary is play the piano划线提问,一般疑问句,否定回答.划线：the piano The girl is good at playing a piano. （ ） the girl is playing the piano? 怎样把 The boy is playing basketball.改成否定句