Unit4WildlifeprotectionTheFourthPeriod(Discoveringusefulstructure)TeachingProcedure:StepOne:Revision1.ReadthevocabularyofUnit4again.2.Asksomestudentstoretellthestoryin“Reading”.3.Checktheanswerstothehomework.StepTwo:Discoveringusefulstructure1.ShowSsthefollowingsentences,thenaskSstochangethemintoPassiveVoice1)Healwayshelpsothers.→Othersarealwayshelpedbyhim.2)Shetoldmetowaithere.→Iwastoldtowaithere.3)Wemustcleanourclassroom.→Ourclassroommustbecleaned.4)Mybrotherwillrepairthebike.→Thebikewillberepairedbymybrother.5)Theyhavefoundtheirmissingchild.→Theirmissingchildhasbeenfound.2.Readandfindstructures(Ex1,P29).3.ExplainthePresentProgressivePassiveVoice.现在进行时的被动语态：结构：am/are/is+beingdoneeg.Thequestionisbeingdiscussedatthemeeting.ThelifeoftheMiludeerisbeingstudiedatpresent.（详见SBP88被动语态）StepThree:Practice1.PutthefollowingsentencesintoPassiveVoice.1)Heismakingachair.→Achairisbeingmade.2)Theyarebuildinganewhospitalnow.→Anewhospitalisbeingbuiltnow.用心爱心专心3)Iamnotdoingmyhomework.→Myhomeworkisnotbeingdone.4)Areyouwashingyourclothes?→Areyourclothesbeingwashed?2.DoEx2,P29andEx1,P64.StepFour:Assignments1.FinishEx2,P64.2.Preview“Usinglanguage”.用心爱心专心
