一、基本结构
注意：be 有人称、时态、单复数变化，分词不变。
二、常考时态被动（初中只考这 6 个）
一般现在时：am/is/are + done
English is spoken all over the world.
一般过去时：was/were + done
The bridge was built last year.
一般将来时：will be + done / be going to be + done
A new park will be built here.
现在进行时：am/is/are + being + done
The room is being cleaned now.
过去进行时：was/were + being + done
The cake was being made at that time.
现在完成时：have/has + been + done
The work has been finished.
三、主动变被动三步法（做题万能）
主动宾语→ 被动主语
动词变 be + done
主动主语前加 by（可省略）
例：We clean the classroom.→ The classroom is cleaned by us.
四、中考最坑高频考点
1. 情态动词被动
情态动词 + be + done：can/may/must/should/have to + be done
The work must be finished today.
2. 感官动词 / 使役动词被动
主动：see/hear/make/let sb do sth
被动：sb be seen/heard/made to do sth
注意：被动必须加 to！
He made me cry.→ I was made to cry by him.
3. 不及物动词无被动
happen, take place, appear, die, arrive 等（错：The accident was happened.对：The accident happened.）
4. 主动表被动（必考）
1.物 + wash/sell/read/write/clean + 副词
The book sells well.
2.be worth doing值得（做）
The book is worth reading.
3.need/require/want doing = need to be done
The flowers need watering.
5. 双宾语被动
give/show/send/bring sb sth两种改法：
人作主语：Sb be given sth
物作主语：Sth be given to sb
五、否定与疑问
否定：be / 情态动词 + not + done
疑问：把 be / 情态动词 /will 提前
六、一句话口诀
被动语态看清楚，be 加过去分词不能输。时态看 be 不看分词，情态后面加 be done。感官使役被动加 to，不及动词无被动。
