Unit 3 Grammar课件2022-2023学年沪教牛津版英语八年级下册

牛津深圳版 八年级下册 Unit3 Traditional skills Grammar Lead-in Damin often （1）__________ (use) cormorants to catch fish. He usually （2）____________ (set off) in the late afternoon. First, a piece of grass（3） ___________ (tie) around the cormorant's neck. Then, the cormorants（4） ______________ (push) into the river. They often（5） ___________ (bring) the fish back to the boat when they get the fish. uses sets off is tied are pushed bring 主动语态 VS 被动语态 Presentation 2. 被动语态：主语为动作的承受者。 The little boy is chased by his brother. 1. 主动语态：主语为动作的发出者。 The little boy is reading a book. 动词语态 【总结】 （1）被动语态的构成由“______________________”构成。其用法如下： a. 表示主语是动作的承受者，动作执行者一般由“________”引出。 b. 侧重说明主语接受动作，无需或无法知道动作的执行者是谁。 be+动词的过去分词 by 4 Presentation 被动语态的构成： be +动词的过去分词 eg. The classroom is cleaned by the students every day. 学生们每天都打扫教室。 My bike was stolen last night. 我的自行车昨天被偷了。 A speech will be given this afternoon. 今天下午有一个演讲。 Presentation Sometimes a cormorant sits on Damin’s head. Damin sets off on his boat with his birds. A piece of grass is tied around the neck of each bird. At night, a light is hung on the post at the front of the boat. The fish are then taken and thrown into a big basket. Read the sentences below. Then decide whether the sentences are in the active form (A) or in the passive form (P). (A) (P) (P) (A) (P) Presentation We form the passive voice in the simple present tense like this: I am(not) seen. You/ We/ They are(not) He/ She/ It is(not) We use ____, ____ or ____ + past participe to form the passive voice in the simple present tense. Work out the rule am is are 【注意】 a. 被动语态的一般疑问句形式，只需要把 be 动词提至主语前。如： Was the photo taken by Karl? 照片是卡尔拍的吗？ b. 被动语态的否定句形式是在 be 动词、情态动词或 have / has 等助动词后加 not。如： The fish was not cooked by Tony. 鱼不是托尼做的。 8 Presentation Look and say (1)Many dishes (wash)by the man every day. are washed (2)The young trees (water)by them every three days.