david has already come back from england（改为否定句）

David has already finished his work(改为否定句） Tom has already come to school.改为否定句? she has already returned from the old block.（否定句改为） He is just come back from Hong Kong(改为否定句） Sonia is from England?（改为否定句） Jim has already finished his homework.（改为否定句） She has already washed her clothes.(改为否定句） Bob has finised his work already.(改为否定句） She has already known the result.(改为否定句） the girl has already come back home.改为一般疑问句 Bruce's just come back from England.(改为反义疑问句） Tom is from England.改为否定句 ：Tom （ ）（ ）England.