8B Unit7 International charitiesGrammar（共24张PPT）

8B Unit7 International charities Grammar Where do ORBIS doctors do operations? ORBIS doctors do operations on the plane. 奥比斯医生在飞机上动手术。 do active voice 主动语态 What is needed by ORBIS to help blind people? More money is needed by ORBIS to help blind people. 更多的钱被奥比斯需要来帮助盲人。 is needed Passive Voice 被动语态 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. B B A A A 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。 When to use the active voice ? We use the active voice when it is important to know who performs the action. 当重要的是知道谁是动作执行者时，我们用主动语态。 When to use the passive voice ? It is obvio