学选修六 Unit3 A Healthy LifeGrammar课件(共13张PPT).ppt

theuseofit theuseof it 1 用作人称代词 代表前面提到的人或事物 who sit me lookatthepicture isapictureofourschool it s it 2 用于代替指示代词this和that isthisjacketyours yes is it 3 用以表示时间 距离 天气 气候 季节 环境等 itishalfpasteightnow it sonlyhalfanhour swalkfromheretoourschool ihopethatitwillbefinetomorrow ithasrainedmuchthisyear it sspringnow it squiethere time distance weather weather season circumstance 4 作引导词 在句中作形式主语或形式宾语 代替后面的短语或从句 insteadof todo itisimportantforustolearnenglishwell ifounditnecessarytotellhimaboutthematter sub formalobject 2 insteadof doing itisnousequarrellingwithhimaboutit ithinkitnogoodtalkingtoher 3 insteadof clause itdoesn tmatterwhetherhewillcomeornot ithinkitnecessarythatwewillattendthemeeting 5 用于强调句型中 it be 被强调部分 that who aperson 从句 imettomintheparkyesterday 1 itwasiwhomettomintheparkyesterday 2 itwastomwhoimetintheparkyesterday 3 itwasintheparkthatimettomyesterday 4 itwasyesterdaythatimettominthepark itwasfiveo clock igothome itwasatfiveo clock igothome when that 1 hedidn tcomebecausehewasill itwasbecausehewasillthathedidn tcome 2 shedidn tgotobeduntilherfathercameback itwasuntilherfathercamebackthatshedidn tgotobed wrong notuntilherfathercamebackdidshegotobed itwasnotuntilherfathercamebackthatshewenttobed 特殊句式 itisreportedthatchinahaslaunchedanotherman madesatellite itisorderedthatthesoldiersshouldcrosstheriveratonce itseemsthathehaslearntofthenews ithappenedthatitooknomoneywithme itmattersverymuch makesgreatdifferencewhethertogoornot 据报导 命令 似乎 碰巧 去还是不去大不一样 6 itsurprisedmethathefailedtopasstheexam 7 itwasnotlongbeforehereturnedtobeijing 8 howlongwillitbebeforehecomesback 9 itwillbelongbeforehecomesback 10 itisfiveyearssincehejoinedtheparty 他考试不及格使我感到惊奇 不久 他就回到了北京 过多长时间他才回来呢 再过很长时间他才回来 他加入政党已经五年了 discussthefollowingsentencesandtellthefunctionof it 1 it sdifficulttorememberalltheirnames 2 it sveryquietinthecaf 3 itrainedforthreedays 4 hemadeitclearthathedidn twanttospeaktome 5 itwasnicetomeetyou 6 itwasontuesdaythatsmithcame 7 it sthreemilesfromheretothenearestgarage exercises 形式主语 代替 circumstance weather 形式宾语 代替 形式主语 代替 用于强调句型中 distance 8 atallmanstoodupandshookhands itwascaptainlawrie 9 ihearyouboughtanewbike canyoushowittome 10 itwasfiveo clockwhenwegotbackhomeyesterday 11 itwasdirtyandwetbelowtheshipwheretheslaveswerekept 12 itwasonthiscoastthatlotsofhispeopledisappeared 13 itwasmostlike