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课件网) 现在进行时被动语态 Discovering Useful Structures When is the passive voice used 1. When we do not know who the subject is, or it is not important who the subject is. e. g. Somebody cleaned the room. (Active) The room was cleaned. (Passive) 2. When it is obvious to the listener or reader who the subject is because it is the person who usually does it. e. g. The cleaner cleaned the room. (Active) The room was cleaned. (Passive) 3. When we give more importance to the object of the sentences rather than the subject, we use passive voice. e. g. The glasses were broken. (We give importance to the object rather than to the subject) A lot of corn is grown in Iowa. Many cars are made in Japan. Highway 15 was closed yesterday due to a serious road accident. 一般过去时被动语态 一般现在时被动语态 We were invited to Daniel and Mary's wedding. The document is being sent right now. 现在进行时被动语态 I am being sent to work in the London office. The dog was being washed when I got home. Their cars were being washed while they were in the mall shopping. The documents will all be signed by next week. 过去进行时被动语态 A bridge is going to be built within the next two years. 一般将来时被动语态 That start-up has been sold for $5 million. The rights to his book have been sold for $250,000. The new manager had been hired before John left the company. All the old houses had been pulled down before the new ones were built. The car will have been loaded by the time he gets home. The crates will have been loaded by then. He said the documents could be issued within the week. Joan's travel plans have to be arranged by December. Criminals must be stopped before they commit crimes. 现在完成时被动语态 过去完成时被动语态 将来完成时被动语态 助动词后的被动语态 A chemical factory is being built (build) near my village now. The trees have been cut (cut) down and the ground has been flattened (flatten) (使变平). Now many materials are being transported (transport) here, including wood, sand, cement, and so on. Some houses have already been built (build) and some are being built (build) right now. Some people say more chances will be provided (provide) for young villagers in the future. However, I am worried about the environment. Since trees are gone, many birds have been forced (force) to leave their habitat in the past months. The river behind our village is being polluted (pollute) and fish are being killed (kill) by the polluted water. Even worse, the polluted water is doing damage to agriculture as well. Our peaceful environment is being destroyed (destroy). Measures must be taken to protect the environment. 短文中的被动语态： 体时 一 般 体 进 行 体 过去时 主动 被动 过去将来时 主动 被动 现在时 主动 被动 (现在)将来时 主动 被动 do / does am / is / are doing did was / were doing will / shall do will / shall be doing should / would do should / would be doing was / were done was / were being done should / would be d ... ...
