▲一般情况：The window is cleaned by(标志) me 玻璃被我擦干净。
The mistakes were corrected by the teacher
①主动形式表被动含义 begin(开始），open,run(运动）
sell,write(写），wash(说），happen=take place发生
breakout(战争）暴发cost(花费），belong to(属于）
主语为物:school begins in sept,The library doesn′t open on Sunday
②主动语态中感观动词和使役动词之后的动词用原形变被动还原to。
感观V:notice, observe, feel,hear,see,watch
使役V:let,make、have、get→使，让
They made him(go)原形(主动）→He was made to go(被动）
I hear him say goodbye to his friends
He is heard to say goodbye to his friends
▲③be( get)done表被动
get(be) hurt受伤 get lost迷路 get killed杀死
▲④have /get sth done表被动 让某物被
·I′u have the bike repaired in no time
自行车被修
⑤主动的V-ing表被动
（need,want,require,worth)+ing表被动=need,want, require, worth-to be done
*·My watch need′s cleaning.=My watch needs to be cleaned.
*your garden needs watering (water) 或 to be watered
