Unit 7Grammar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Yesterday I parked my car outside of the schoolA sound of piano is heard in the next room.Active voice and Passive voice一般现在时： am/is/are + done一般过去时： was/were + done一般将来时： shall/will + be done现在完成时： has/have + been done过去完成时： had + been done现在进行时： am/is/are + being done 过去进行时： was/were + being done 一 被动语态主要几种时态1.This song is often sung by children2. The house was built in 19633.I hope the plan will be agreed to4.The piano is being played now in the next door5.When we went to see Tom, he was being operated on 6.These bikes have been repaired.7.He told me the work had been finishedSome examples:根据语境语义的需要，被动语态常用于以下几种情况；1. 当我们不知道谁是动作的执行者或没必要指出谁是动作的执行者时English is spoken all over the world2. 当强调动作的承受者时She has always been admired 3. 动作的执行者不是人而是无生命的事物时The crops were destroyed by the strom二 被动语态的使用：China has sent up another space capsule.another space capsule.another space capsule.another space capsule.another space capsule.another space capsule.Another space capsulehas sent uphas sent uphas sent uphas sent uphas sent uphas been sent upChina China China China China by China.Farmers have planted many trees .many treesmany treesmany treesmany treesmany treesMany treeshave plantedhave plantedhave plantedhave plantedhave plantedhave been plantedFarmers Farmers Farmers Farmers Farmers by farmers.has/have been done… help, helped, helpedhelp, helped, helped*The computer has helped them greatly.*They have been helped by the computer greatly.paint painted painted* The artist has painted two stars.* Two stars have been painted by the artist.cook coo...
