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ORBIS doctors do operations on the plane.
do active voice 主动语态
②What is needed by ORBIS to help blind people ?
More money is needed by ORBIS to help blind people.
is needed Passive Voice 被动语态
Step 2?Presentation
1.判断：被动语态( A )/主动语?态( B );被动语态要划出动词部分．
1）Millie and Amy took the little cat to the animal center yesterday.
2）The 79-year-old man was saved out of a fire last year.
3）This kind of cake is called mooncake.
4）People use a keyboard to type information into the computer.
5）The windows in our classroom are cleaned once a week.
2.主动语态表示主语是动作的执行者，被动语态表示主语是动作的承受者，当主 语和谓语动词构成被动关系时，通常需要用被动语态。汉语中常用“被”、“给”、“由”、“受”等词来表示被动，而英语中则用“be+动词的过去分词”来表示。
3.总结：动作的执行者是谁是很明显的
我们不知道动作的执行者是谁或不需要知道动作执行者是谁。
我们强调是动作承受者而不是动作的执行者
4.呈现更多例句：
(1) This writer’s books are sold in many countries
(2) Rice is grown(种植) in China.
(3) Some windows were broken last night.
(4) This book was published in 2003.
Step3 Presentation
1. ①ORBIS doctors do operations.
Operations are done by ORBIS doctors.
②On the plane, volunteer doctors do operations.
Operations are done by volunteer doctors
We can also introduce who or what performs an action in the passive voice using by. We put by and the performer after the verb.
2.Complete Part A
Step 4 Homework
a. Go over what we have learnt.