They have already finished the work.如何改为否定句

They have already finished the work.如何改为否定句 完成句子 They have already finished their work .（改为否定句） They have already finished their homework（改为否定句） She has already finished the work.改为否定句. he has finished the work already 改为否定句 I have already finished the work.（变否定句） They have already finished tgeir work改为一般疑问句 Bob has finished his work already.改为否定句 she‘s already finished her work 改为否定句 David has already finished his work(改为否定句） I have already finished my homework(改为否定句） I have already finished reading it改为否定句