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课件网) Grammar Passive Forms in the Past Unit 10 Connections 1.To master passive forms in the past. Learning objectives Revision Explain the “Six Degrees of Separation” theory by using the diagram. We clean the classroom every day. 我们每天打扫教室。 (主动语态，主语we是clean这一动作的执行者) The classroom is cleaned every day. 教室每天被打扫。 (被动语态，主语the classroom是clean这一动作的承受者) 被动语态 英语中的语态分为主动语态和被动语态。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。 以下几种情况常用被动语态： 1) 不知道或没有必要指出谁是动作的执行者； 2) 为了强调动作的承受者； 3) 主语有较长的修饰语时； 4) 通知、公告，新闻报道和科技报道等。 Read the sentences. Underline the passive forms. What tense is used in each sentence 1. The concept was first talked about as long ago as in the 1920s. 2. In the 1950’s, an attempt was made by two scientists to prove the theory mathematically. 3. Once the parcel had been received by this person, he/she would send the parcel onto a contact of theirs until the parcel could be personally delivered to the correct person. past simple passive past simple passive past perfect passive past simple passive 4. Its name was used as the title of a play and then a film. 5. Soon the game was being played in universities across the United States. past simple passive past continuous passive Read the description of a “Six Degrees of Separation” experiment. Use the correct form of the verbs in brackets to complete the passage. We 1 （give） the task of finding out whether the “Six Degrees of Separation” theory worked at our school. We 2 （tell）about the “Small-world” experiment in the United States，where packages 3 （send）from one person to another with the aim of getting it to a stranger in the end. While the idea behind this experiment 4_____ （discuss）in our group，it 5 （suggest）to us by our teacher that we try something similar. So we did. We couldn’t send parcels，but we could send letters. Ten volunteers 6_____ （choose）to take part and they 7 （ask）to write a letter of introduction to another person in the school that they didn’t know and then to choose someone who they thought 8_____ （connect）to that person to give it to. After all the letters 9 （exchange）several times，seven out of the ten target people did receive their letters with chains of five or six people in each case! We think this means that our experiment was a success and it supports the theory. were given were told had been sent was being discussed was suggested were chosen were asked was connected were exchanged 一般过去时的被动语态: was/were + 过去分词 过去进行时的被动语态: was/were being + 过去分词 过去完成时的被动语态: had been + 过去分词 例如： How many buildings had been destroyed when the hurricane ended The Structure of Passive Forms in the Past Grammar—Passive Forms in the Pa ... ...
