Unit6Grammarinuse课件沪教版(五四制)英语七年级下册

英语七年级下册多媒体教学课件ENGLISH7B

Unit6Grammar

in

useNumeralsTreesQ

Howmuchdoyouknowaboutnumerals?Thinkandtick1Doaquizabouttrees.1.Forestscoverabout________oftheEarth’slandarea.a.thirty-onepercent b.thirty-fivepercent2.TheAmazonRainforestcoversabout________millionsquarekilometres.a.sixpointseven b.sevenpointsix3.TheAmazonRainforestcontains________oftheworld’sliquidfreshwater.a.onefifth

b.onesixth

4.Thereareover________lakesintheJiuzhaigouValley.a.ninety b.onehundredReadandthink2ReadthesentencesandwritedownthenumbersinArabicforms.(1)TheAmazonRainforestcoversaboutsixpointsevenmillionsquarekilometres.(2)Forestscoveraboutthirty-onepercentoftheEarth’slandarea.(3)ThereareoveronehundredlakesintheJiuzhaigouValley.(4)TheAmazonRainforestcontainsonefifthoftheworld’sliquidfreshwater.6.731%100

Tick(√)theone(s)thatyouagreewith.Workouttherules33Intheabovecontext,weusenumberstoshow...▢timeordates.▢aspecificamount.▢theorderofevents.√Learntosaythenumbers.Workouttherules33101112131415161718192030405060708090Whenwesayfourteen,westressthesecondsyllable.Whenwesayforty,westressthefirstsyllable.teneleventwelvethirteenfourteenfifteensixteenseventeeneighteennineteentwentythirtyfortyfiftysixtyseventyeightyninetyCardinalnumbersLearntosaythenumbers.Workouttherules33Cardinalnumbers2832445963758991Whenwewriteatwo-wordnumber,weadda“-”.twenty-eightthirty-twoforty-fourfifty-ninesixty-threeseventy-fiveeighty-nineninety-oneLearntosaythenumbers.Workouttherules33Cardinalnumbers1002001,00010,000200,0001,000,00020,000,000300,000,000onehundredtwohundredonethousandtenthousandtwohundredthousandone

milliontwenty

millionthreehundred

millionthousandmillionAmongthecardinalnumbers,hundred,thousandandmillionhaveno“s”.Learnabouttherules.Notes:

Weusecardinalnumberstocountandsayhowmanyofsomethingthereare.我们用基数词来计数和表示事物的确切数量。e.g.Therearesevendaysinaweek.ThereareoveronehundredlakesintheJiuzhaigouValley.Workouttherules33CardinalnumbersLearntosaythenumbers.Workouttherules33Ordinalnumbers59121002030409021334569ty+tieth1234firstsecondthirdfourthfifthninthtwelfthonehundredthtwentieththirtiethfortiethninetiethtwenty-firstthirty-thirdforty-fifthsixty-ninthNotes:

Mostordinalnumbersaremadebyadding“-th”tothecardinalnumbers,exceptforone,twoandthree.Learnabouttherules.Notes:

Weuseordinalnumberstoshowthepositionofsomethinginanorderlist.我们用序数词来表示事物在有序列表中的顺序。e.g.Carlwonsecondprizeinthespeechcompetition.

Workouttherules33OrdinalnumbersLearntosaythenumbers.Workouttherules33Decimalspointzerosixfifty-ninetwothreeNotes:

Wesayeachnumberseparatelyafteradecimalpoint.小数点后的每个数字应分别念出。Learntosaythenumbers.Workouttherules33FractionsNotes:

1.Fractionsareexpressedbyusingcardinalnumbersandordinalnumberstogether.分数用基数词和序数词共同来表示。2.Ifanumeratorisover1,weneedtoadd“s”afterthedenominator.如果分子大于1，我们需要在分母的表达后加s。onetwothirdthirdsnumeratordenominatorOrdinalnumbersCardinalnumbersLearntosaythenumbers.Workouttherules33Fractionstwoonefifthandmixedfractionspecialfractionsahalfa/onequarterthreequarters(1)Morethan_________________ofallpeopleoutsidecitieslivewithin1kilometreofaforest.(2)Currently

(现时；目前),thetallesttreeisacoastredwood(海岸红杉).Itreached______________________________metresin2019.(3)Theoldesttreeisabristleconepine

(刺果松；长寿松).Itisover______________________yearsold.(4)About_______________oftheAmazonRainforestwasdestroyedbyhumanactivitiesinthelasthalfcentury.Practise4Completeeachofthesentenceswithonenumberinthebox.Spelloutthenumbersinfull.threefourths/quarters

onehundredandsixteenpointzero/ohsevenfourthousandeighthundredseventeenpercentAnintroduction5Introducetheplanetree(悬铃木)toyourdeskmateaccordingtotheinformationbelow.e.g.Theplanetreecangrowupto40metrestall.(Answersmayvary.)(1)Theleavesoftheplanetreeare/measuretentotwenty-fourcentimetresinlength.(2)Thetrunkoftheplanetreecanreachawidthofaboutonepointthreemetres.语法精讲——数词1.数词1.1.基数词和序数词基数词表示数量，序数词表示顺序。序数词由基数词变化而成，具体构成如下：构成例句第一、第二、第三需特殊记忆。first第一second第二third第三4-19的序数词是由其相对应的基数词后面加－th构成。eleven→eleventh第十一thirteen→thirteenth第十三有4个词拼写不规则：fifth,eighth,ninth,twelfth.整十的序数词由其对应的基数词变词尾字母y为ie,再加－th构成。（注意：ten的序数词为tenth.)twenty→twentieth第二十

fifty→fiftieth第五十

表示“第几十几”时，只将个位数变为序数词，十位数仍用基数词。thirty-one→thirty-first第三十一fifty-six→fifty-sixth第五十六1.2.数词的用法内容用法例子分数表示法

分子用基数词，分母用序数词。分子大于1时，作分母的序数词需用复数形式。单词之间可有连字符，也可以没有。如果是带分数，用and连接整数和分数即可。1/3:one-third

年龄表示法用“in+one's+整十的基数词的复数形式”表示“在某人几十多岁时”。表示一个人具体的岁数时，可用“attheageof+基数词”表示。Mygrandmotherisnowinhereighties.我奶奶现在80多岁了。

编号表示法①用基数词编号时，用“名词＋基数词”表示。②用序数词编号时，用“the+序数词＋名词”表示。502房间：Room502第七页：theseventhpage1.3.确切数目和大约数目的表示法类别表达法例子确切数目当

hundred,thousand,million等前面有具体数字或有many,sev