把句子改为被动语态和同义句

把句子改为被动语态和同义句 把句子改为被动语态 把He can finish the work in two days.改为被动语态和同义句转换 把这些句子改为被动语态 请把句子改为被动语态! 把这个句子改为被动语态的同义句~In 1770,people found that they could use the rubber as eraser. 用被动语态把该句改为同义句We can do something to keep ourselves safe. 德语把主动语态改为被动语态 英语句子改被动语态（高中）把这句改为被动： Mother was not mending the trousers.顺便请教一下,现在进行时主动该被动要怎样变化呢?还有过去完成时,过去进行时,一般将来时,过去完成时和将来 按要求改写句子Someone saw him running down the street at 11 last night.(改为被动语态)__________________________________________________________His books were lost.(改为同义句)_________________________________________________________ 如何把主动语态的句子改为被动语态,希望有例子.（英语） you must clean your watch once a year的同义句改为被动语态， 英语,将句子改为被动语态 这两个英语句子改为被动语态! 求检查,英语句子改为被动语态 把英语句子改为被动语态将该句子改为被动语态The Chinese capital wants to finish all of its sports buildings by 2007 怎样将句子改为被动语态?怎样讲句子改为被动语态? 改为同义句和改为被动语态Tim needs to cut his hair because his hair is too long 改为同义句Tim needs to ()his hair() because of his () hairwe must ask Tom to clean his room again改为被动语态Tom() () () to clean his room again