九年级英语上册Unit4GrowingupPeriod3Grammar上课课件牛津译林版.pptx

Unit4GrowingupPeriod3Grammar1课时导入2课文呈现3考点精讲4单元语法沙龙5课堂小结

Howmuchdoyouknowabouthim?

GrammarA.Usingbefore,after,whenandwhileWeusetheconjunctionsbefore,after,whenandwhiletointroducetimeclauses.Theycanbeplacedatthebeginningorinthemiddleofsentences.TIPBeforeandaftercanalsobeusedasprepositionsoftime.before9a.m.

Beforemeansearlierthanacertaintime.beforeHeremainedthereforaboutayearbeforetheNBAtooknoticeofhim.Aftermeanslaterthanacertaintime.Afterhegraduated,hewasforcedtoplayinanotherbasketballleague.Whenmeansatorduringacertaintime.Whenhefinallygotthechance,hescored20pointsinhisfirstgame.

Whilemeansduringacertaintime.While(hewas)attendingjuniorhigh,Spudtriedoutfortheschoolteam.OneofDavid’sdaysDavidiswritinginhisdiaryaboutoneofhisdays.Helphimcombinehissentencesusingbefore,after,whenorwhile.

1.Igojoggingeverymorning.ThenIhavebreakfast.__________________________________________________2.Ipractisedplayingbasketballforhours.Ifelttiredout.__________________________________________________3.ImetPeter.Iwaswaitingatthebusstop.__________________________________________________IhavebreakfastafterIgojoggingeverymorning.IfelttiredoutafterIpractisedplayingbasketballforhours.ImetPeterwhileIwaswaitingatthebusstop.

4.IwaswatchingTV.Ireceivedacallfrommyuncle.__________________________________________________5.Iwasreadytogotobed.Myfathercamebackfromwork.____________________________________________________________________________________________________IwaswatchingTVwhenIreceivedacallfrommyuncle.Iwasreadytogotobedbeforemyfathercamebackfromwork.

B.Usingsince,tillanduntilTIPSince,tillanduntilcanalsobeusedasprepositionsoftime.since2006till/untiltoday

Wealsousetheconjunctionssince,tillanduntiltointroduc