Unit4Where'smyschoolbag?第四课时SectionB(1a～1e)1．方位介词on，under和in三姐妹都是方位介词。它们都可以用在名词或代词前表示方位。让我们一起来认识它们吧！(1)我是方位介词on，意为“在……上”，常指某物在另一物的表面上。另外：树上长出的叶子/果实，也用on。(2)我是方位介词under，表示“在……下方”，指在某物垂直的下方，反义词是on。eg：Herbaseballisunderthebed.(她的棒球在床底下。)(3)我是方位介词in，表示方位时，意为“在……里面”，常指某物在某范围或空间内。eg：HisCDsareinthebag.他的唱片在包里。另外：外在的物品在树上用in。eg：Tom'skiteisinthetree.Tom的风筝在树上。2．词组归纳：tapeplayer录音机modelplane飞机模型Englishbooks英语书undertheradio在收音机下面一、用适当的介词填空。1．Mysisteris______herroom.2．Thisisaphoto________hisfamily.3．Thanks______yourbooks.4．CallJane______5473268.5．Mybooksare__________theradio.offoratunderinclockmodelplane二、根据句意及汉语提示写单词。6．His_________(钟)iswhite.7．Jim's_____________(飞机模型)isinhisroom.8．Some_______(磁带)areonthebed.9．IsthisAlice's________(收音机)?10．Thisisher__________(播放机)．Thatisherhat.tapesradioplayer三、单项选择。11.—Where'smymodelplane?—It's______thedesk.A．underB．onC．inD．at12．Where______hisbooks?A．isB．areC．/D．isn't13．Thisis______Englishbook.A．myaB．amyC．myD．meBBC14．—Wherearemykeys?—Sorry，______．A．IknowB．InotknowC．IknownotD．Idon'tknow15．—Arethetapesinthebookcase?—______A．Yes，theyaren't.B．Yes，itis.C．Yes，theyare.D．No，itisn't.DC四、根据汉语完成句子。16．我的书包不在床上。Myschoolbag____________onthebed.17．我哥哥的钟在椅子下面。My________________is_________thechair.18．录音机在课桌上。The__________is_______thedesk.isnotbrother'sclockundertapeplayeronmodelplaneunderthesofadon'tknow19．—你的飞机模型在哪里？—它在沙发底下吗？—Where'syour___________?—Isit_______________?20．我不知道他的名字。I______________hisname.AB五、完形填空。LiYan：Look，Betty！21.__thatunderthedesk?Betty：It's22.__watch.It'sblue.LiYan：Isitnew?Betty：Yes.Isit23.__？LiYan：No.Mineisold.Whoseisit?Betty：Itlook...
