中考英语--被动语态讲解 课件 (共39张PPT)

When How What 定义 :表示主语是动作的承受者. 当句子的主语是动作的执行者时，谓语的形式是主动语态。 When How What When do we use the passive voice? Many houses will be built here. 1. 不知道或没必要指出动作的执行者。 The plan was supported by those who wished to have more chances to speak English. 2. 出于礼貌, 不愿意说出动作的执行者。 When How What We keep food in the fridge. S V. O. Food How to change into the passive voice sentence is kept (by us) in the fridge. 主动语态变被动语态的方法： 1.把主动语态的宾语提到前面作被动语态的主语; 2.把主动语态的动词变成“be + 过去分词”; 3.把主动语态的主语变为介词by的宾语,可省略。 They make shoes in that factory. Shoes are made by them. They play football on Sunday. Lucy does the homework in the evening. They often use computers in class. We make these machines in Beijing. Football is played by them on Sunday. The homework is done by Lucy in the evening. Computers are often used by them in class. These machines are made in Beijing. 一般现在时的被动语态： S+ am/is /are +done 一般现在时的被动语态 They make TV sets in that factory . TV sets are made by themin that factory. The