请问They will have finished work on the new stadium.句中的work on

请问They will have finished work on the new stadium.句中的work on they will have finished work on the new stadium.on they will have finished work on the new stadium. they will have finished work /on the new stadium.这句话是不是应该这样断 workers will have finished work on the new stadium这个句子当中work they (them)finished the work on time They finished the work ____(perfect)on time. __we could not have finished the work on time. By the end of next year they will finish the work on the new They have already finished the work.如何改为否定句 ( )the end of next month they will have finished the work. They have finished their work主动句改为被动句