Unit 8 Grammar 课件2023-2024学年牛津译林版八年级英语下册

Unit 8 A green world Grammar Passive voice in the simple future tense To learn how to form the passive voice in the simple future tense; To learn how to use the passive voice in the simple future tense. Do some exercise Learning aims: contents Reiview Task 1 语态分类 Classiification of voice 语态是动词的一种形式，表示主语与谓语之间的关系。英语动词有两种时态，主动语态和被动语态。 主动语态表示主语是动作的执行者。如： Volunteer doctors do operations on the plane. 被动语态表示主语是动作的承受者。如： Operations are done by volunteer doctors on the plane. When to use the passive voice? Task 2 The plane is used as a training center. His eye problem was cured two months ago The lives of the patients with eye problems are improved. The problem was talked about just now 动作的执行者是泛指或者不言明时. 在不知道或是不必知道动作的执行者是谁时。 需要强调动作的承受者时。 出于委婉或礼貌而避谈动作的执行者时. 1. A boy called Tom had eye problems. 2. He wrote to ORBIS for help. 3. He was operated on last month. 4. His eye problem was cured. 5. ORBIS helps him see the world again. 6. His life is improved now. Active Passive Practice 各时态的被动语态 1.一般现在时 2.一般过去时 3.一般将来时 4.拓展 He cleans the floor . The floor is cleaned by him. 主语 + __________ + _______ 1.一般现在时 am/is/are 过去分词 在被动语态的句子中，如果我们需要指出动作的执行者，可以由by 引出。 He cleaned the floor . The floor was cleaned by him. 主语 + __________ + _______ was/were 过去分词 2.一般过去时 The dog is going to eat some vegetables . Some vegetables are going to be eaten by the dog. 主语 + ____________ + _______ 过去分词 3.一般将来时 will be be going to be Exercise I am going to eat some apples. Some apples are going to be eaten by me. 被动语态结构：主语+be +done 肯定句: Some old clothes will be sent to the factories. 主语+will/be going to+be+过去分词 否定句: Some old clothes will not be sent to the factories. 主语+won't/be not going to+be+过去分词 一般将来时被动语态的句型结构 Will+主语 + be + 过去分词 Be+主语+going to + be +过去分词 一般疑问句: Will any old clothes be sent to the factories ? We use the passive voice in the simple future tense when the action has not taken place yet. e.g. You will be punished if you cut down a tree. I