Unit7SectionB1a-1eTalkaboutthepriceoftheclothes.Howmuchisthathat?It’sfivedollars.Howmuchis/are…?It’s…/They’re…$7$5$6$3$9$8teneleventwelvethirteenfourteenfour+teen→sixteenseventeennineteenfifteeneighteen10111213141518161719Numberstwentythirtytwenty-onetwenty-twothirty-one2030212231Talkaboutthepricesoftheclothes.Howmuchisthathat?It’sfivedollars.Howmuchis/are…?It’s…/They’re…$7$5$11$15$20$260到120zero1one2two3three4four5five6six7seven8eight9nine19ten11eleven12twelve你發(fā)現(xiàn)了什么規(guī)律?

Listenandrepeat.

10111213141516171819202122232425262728293031Chantthenumbers,clapifthenumbercontains:One:clapon1,21,31Two:clapon2,22Three:clapon3,33…ten___eleven___twelve___thirteen___fourteen___twenty-five___twenty-six___twenty-seven___twenty-eight___twenty-nine___twenty___twenty-one____twenty-two___twenty-three___twenty-four___

Writethenumbersin1anexttothecorrectwords.Whichrowsofnumbersareinthewrongplaces?1011121314252627282920212223241bfifteen___sixteen___seventeen___eighteen___nineteen___18171615303119thirty___thirty-one___13到1913thirteen14fourteen15fifteen16sixteen17seventeen18eighteen19nineteen你發(fā)現(xiàn)了什么規(guī)律?13--19的數(shù)字都以“個(gè)位數(shù)+teen”組成，其中，thirteen，fifteeneighteen需要特殊記憶20到90的整數(shù)20twenty30thirty40forty60sixty70seventy80eighty90ninety你發(fā)現(xiàn)了什么規(guī)律?20--90的整數(shù)都以“ty”結(jié)尾，其中，sixty，

seventy，ninety都是十位數(shù)詞直接加“ty”Listenagain.CirclethethingsinthepicturethatKateandhermomtalkabout.Check(√)thethingKatebuys.1d√Howmuchisthebluesweater?It’s15dollars.Askandanswerquestionsaboutthethingsinthepictureabove.

1e1.基數(shù)詞表達(dá)

1)one–twelve：拼寫和讀音無規(guī)律。

2)thirteen–nineteen：十幾。在個(gè)位數(shù)后加后綴-teen,注意thirteen,fifteen和eighteen。

3)twenty

–ninety：幾十。以ty結(jié)尾,注意twenty,thirty,forty,fifty,eighty。4)21~29–91~99：幾十幾。

用整十位數(shù)加個(gè)位表示,中間用連字符“-”把十位和個(gè)位連接起來。

5)onehundred：一百。也可說ahundred,可加具體數(shù)字,如ninehundred(900)。hundred要用單數(shù)。2.基數(shù)詞用法基數(shù)詞只能修飾可數(shù)名詞，要注意數(shù)詞和名詞在數(shù)上要保持一致。如：一名學(xué)生onestudent

兩名男孩twoboys

二十個(gè)蘋果twentyapples

三十三個(gè)雞蛋thirty-threeeggs1:1---12:(每個(gè)單詞單獨(dú)記憶)

2:13---19:-teen(thir-,fif-,eigh-)3:20---90:-ty(twen-,thir-,for-,fif-,eigh-)4:21---99:十位-+個(gè)位5:100---900:___h