Unit 3 The world of science Using language课件 (共40张，内嵌视频）2024-2025学年高中英语外研版（2019）必修第三册.pptxVIP

Unit3

Theworldofscience

LearningObjectives01

LearningObjectives01Identifyandsummarisetheformsandfunctionsofpresentperfectpassivethroughobservation,andapplyitcorrectlyindifferentcontextsandsituations;03Utiliseappropriatestructurestointroducescientistsandtheirachievementsinvariousfields.02Understandthemainideaoflisteningmaterials,gatherspecificdetailstocompletethenotesandexploregeneraltopicsrelatedtoinventionsindailylife;

Guidestudentstounderstandtheformsandfunctionsofpresentperfectpassivethroughobservation,andapplyitcorrectlyinarealcontext;Guidestudentstounderstandthestorybehindeachinventionthroughreadingandlisteningmaterials,andstimulatestudents’interestinscientificandtechnologicalinventions.0102TeachingFocusesandAnticipatedDifficulties

Grammar02

Lookingatthesentencesfromthereadingpassageandanswerthequestions.Whathashappenedto“you”insentence(a)?Whohasusednewinventionstomakereplacementheartsandbonepartsinsentence(b)?Peoplehaveused3Dprinterstomakereplacementheartsandboneparts.Someonehasaskedyou”aboutthetitleofyourbookbefore.

Lookingatthesentencesfromthereadingpassageandanswerthequestions.Whatisthedifferencebetweenthetwogroupsofsentences?Inthefirstgroup,thewordsinboldshowtheuseofthepassiveformwiththesubiects,whileinthesecondgroup,thewordsinboldshowtheuseoftheactiveformwiththesubiects.Whydoestheauthorchoosetousethepassiveforminsteadoftheactiveforminthereadingpassage?Theauthorchoosestousethepassiveforminsteadoftheactiveformtoemphasisewhathasbeendone,ratherthanwhoorwhatdoestheaction.

Presentperfectpassive—现在完成时的被动语态基本结构用法：与副词及时间状语连用与引出的时间状语（从句）连用时间状语从句其他与一般过去时的被动语态的区别

基本结构现在完成时的被动语态的基本构成是：have/hasbeendone一般疑问句：Have/Has+主语+beendone(+其他)?—Hasherworkbeenfinished?（她的工作完成了吗?）—Yes，ithas.（是的，完成了。）特殊疑问句