被动语态的构成：be + P.P.( done ) ① 一j般现在时的被动语态：am∕is∕are + P.P.The classroom is cleaned by the students every Friday .② 一a般过去时的被动语态：was∕were + P.P.That tree was cut down by them last night.③ 一l般将来时的被动语态：will∕shall + be + P.P.These pictures will bw sent to the museum next week .④ 过去将来时的被动语态：would∕should + be + P.P.They said that the piano would be delivered to your house soon .⑤ 现在进行时的被动语态：am∕is∕are + being + P.P.The house is being painted by Tom.⑥ 过去进行时的被动语态：was∕were + being + P.P.The bridge was being repaired by the workers this time last Sunday.⑦ 现在完成时的被动语态：have∕has + been + P.P.All the flowers have been watered by the farmer.⑧ 过去完成时的被动语态：had + been + P.P.Tom said that work had been finished.⑨ 情态动词的被动语态：情态动词 + be + P.P.These flowers must be watered every day .\x0duuc末е▃ha┄s《vus《l长Υ丁