广东省惠州市惠东县惠东荣超中学高中英语 Unit3 Computer 第 3学时 Grammar 学案 新人教版必修 2 I. Check the homework.II. 在课文中找出所有包含现在时完成时态的句子，并把它们写下来。_____________________________________________________________________________________________________________________________________________________________________________________________________________2. Change the Active Voice into the Passive Voice:Group A1. We have finished our homework.2. Many visitors have visited the Great Wall.3. Mike has seen two films since last month.4. The Russian government has turned these palaces into museums.Group B1. Our homework has been finished by us.2. The Great Wall has been visited by many visitors.3.Two films have been seen by Mike since last month.4. These palace have been turned into museums.A 组强调动作的执行者,是主动语态,结构:主谓宾, 相同点:两组都是完成时态,结构: have/has+过去分词B 组的句子强调动作的承受者, 是被动语态.相同点: 两组都是完成时态结构: 助动词 have/has been +过去分词3.现在完成时(have/has + 过去分词)现在完成时的动作或情况虽然发生在过去，但它强调的是与现在的关系，用来说明现在的情况。 现在完成时 被动语态(have/has + been + 现在分词）Change the following sentences into the present perfect passive voice. Put the verbs into the correct form.1.We have bought a new personal computer.___________________________________________2.We have found many problems with our new computer._______________________________________________3. They have built a PC the way we wanted._________________________________________4. They have just joined our computer to the Internet.________________________________________________5. We have used the computer every day since we bought it._______________________________________________4 Exercises1. Both my brother work at the power station that ___ in...
