老师：hello， everyone welcome to the second period of unit eight when is your birthday im your English teacher miss jiao， in this period， we are going to learn some grammar we will focus on the original numbers and how to use them to express dates。 okay now lets look at the learning objectives of this period by the end of this class youll be able to identify the original， and the cardinal numbers and youll be able to tell the difference between in， and on youll also be able to talk about birthday information， first lets play a game sharp eyes to see who can find out the difference between these numbers quickly and correctly now lets read these sentences together， mister smith is thirty one years old， there are three cars in the car park this sweater is nine dollars， tims birthday is on August， fifth the basketball game is on October fifteenth the first class is the English class， can you find the difference between them， boys and girls， lets read these three sentences again mister smith is thirty one years old， there are three cars in the car park that sweater is nine dollars thirty one three nine these numbers are called cardinal numbers。 we have learned cardinal numbers in the previous class they are used to give the exact county，now， lets look at these three sentences again tims birthday is on August fifth， the basketball game is on October fifteenth the first class is the English class fifth fifteenth first these numbers are called original numbers， they are used to give the exact position of the objects， now lets look at the examples， these original numbers are used to show the positions of different runners in the race，now， lets read these numbers together to see how to change the cardinal numbers into the original ones， one first two second three third。 fourth five fifth。 six seven seventh eight eighth nine ninth eleven eleventh。 twelve twelfth thirteenth fourteen，fourteenth。fifteenth。 sixteenth seventeen seventeenth eighteen eighteenth nineteenth twenty twentieth twenty one twenty first。 twenty two twenty second twenty three twenty third twenty。
老师：fourth twenty five twenty fifth twenty six twenty sixth， twenty seventh twenty eighth twenty nine， twenty ninth thirty thirtieth thirty one thirty first， have you found out how to change the cardinal numbers into the original ones， the first secret is that for most of them， we can add th to the cardinal numbers to form the original ones， there are also some special rules that we need to remember first， lets look at these numbers to see how to change these cardinal numbers into ordinary ones， one first，two，second， three third eight eighth nine ninth five fifth twelve twelfth twenty twentieth twenty fourth 这些是特殊的变法。 123 特殊记 8 去 T9 去 e f 来 VET 整 10 位 y 变 ITH 前有小 E 20 以上更容易，十位不变，只需来把个位变。
老师：We have
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