Unit 3 The Internet Discovering Useful Structures( 导学案)-【上好课】高一英语同步备课系列（人教版2019必修第二册）

Unit 3 Discovering Useful Structures导学案 学习目标 1. To learn the Present perfect passive voice. 2. To use Present perfect passive voice to discuss the advantages and disadvantages of Internet. 学习重难点 1. 学习现在完成时被动语态结构和用法 2. 灵活掌握现在完成时被动语态的用法，学会正确使用现在完成时被动语态和主动语态对情况进行描述。 知识回顾 1.你知道现在完成时的结构吗？ 2.现在完成时的用法是什么？ 课前预习 划出下列诗句中的出现的现在完成时。 Look at the way your face has been washed Look at the way your teeth have been brushed Look at the way your shoes have been cleaned You’d better do them again. Look at the way the flowers have been planted Look at the way the grass has been cut Look at the way the paths have been swept I hope that you’ll come here again. 课中探究 1. 现在完成时的结构 主动结构：______________________________ 被动结构：______________________________ 肯定式 否定式 一般疑问句 特殊疑问句 2. 主动语态变为被动语态的原则 三变：__________________________ 三不变：________________________ 3.将下列句子变为被动语态。 ⑴ They have put the computer into a robot. __________________________________________________________________________ ⑵Though we don’t know what was discussed, yet we can feel that we have changed the topic. ____________________________________________________________________________ ⑶It is widely believed that the four men have been killed by the accident. ____________________________________________________________________________ ⑷It is detective Sam Peterson who is in charge of the case. ____________________________________________________________________________ ⑸They look very happy because they have solved the difficult problems. ____________________________________________________________________________ ⑹Don’t worry. The doctors have already operated on the injured boy ____________________________________________________________________________ ⑺Scientists have made a new robot which can walk and talk like humans. ____________________________________________________________________________ ⑻The government has spent a lot of money on the Hop