We clean the room every day
The room is cleaned every day
由“助动词（ be ） + 及物动词的过去分词”构成
助动词 be 有人称、数和时态的变化
Passive Voice(Active voice)(Passive voice)be + done被动语态 amam is is areare waswas werewere has has have beenhave beenamam is + being is + being arearehad been beenshallshallwill + bewill + bebe going tobe going tocancanmay + bemay + bemustmustwas + being was + being werewere 一 般 状 态 进 行 时 态 完 成 时 态 现 在 amis ﹜ doneare amis ﹜ being doneare has ﹜ been donehave 过去 was ﹜ donewere was ﹜being donewere had been done 将来shall ﹜be donewill × × × shallwill ﹜ +have been done过去将来 should ﹜be done would × × × shouldwould + have been done That old man was often laughed at
The doctor has been sent for
Time must be made good use of
That old man was often laughed
The doctor has been sent
Time must be ma
