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1、Unit 1 Hello again! Lesson 4 冀教四年级下册,四十,New words,五十,六十,七十,八十,九十,New words,Dannys game,点击画面 播放视频,How many books are there on my desk, Jenny?,One, two, three, four, five, six, seven, eight. There are eight books.,Lets put eight books on the eight books. How many books are there on my desk now?,Sixtee
2、n!,Lets put twenty-nine books on the sixteen books. How many books are there?,One book!,Oops!,3. Lets put eight books on the eight books. 让我们在这8本书上放8本书。,lets：让我们；表示建议或邀请别人和它一起做某事。 注意：lets 是let us的缩写。 结构：Lets+动词原形+其他.,例：Lets eat some apples. 让我们吃点苹果吧。 All right. 好的。,Numbers,点击画面 播放视频,1 one 11 eleven
3、2 two 12 twelve 20 twenty 3 three 13 thirteen 30 thirty 4 four 14 fourteen 40 forty 5 five 15 fifteen 50 fifty 6 six 16 sixteen 60 sixty 7 seven 17 seventeen 70 seventy 8 eight 18 eighteen 80 eighty 9 nine 19 nineteen 90 ninety 10 ten 100 one hundred,Can you say the numbers from thirty to forty?,Yes
4、! Thirty, thirty-one, thirty-two ,Language points,基数词 ：用来表示数目或数量的词称为基数词。,112的基数词是独立的单词，有其各自的形式： one 1，two 2，three 3，four 4，five 5，six 6，seven 7，eight 8，nine 9，ten 10，eleven 11，twelve 12,1319的基数词都以-teen结尾 fourteen14，sixteen16，seventeen17，nineteen19 其中thirteen13，fifteen15，eighteen18的拼写比较特殊。,2090的整十数都以
5、-ty结尾 sixty60，seventy70，ninety90 其中twenty20，thirty30，forty40，fifty50，eighty80的拼写比较特殊。,hundred: 百 在表示具体的数目时，hundred后面不加-s，也不加of。 例：three hundred 300 five hundred 500,基数词的写法： （1）几十几的写法：在十位数与个位数之间加连字符“-”。 例：forty-two 42 twenty-four 24 （2）几百几十几的写法：在百位数和十位数之间加and。 例：one hundred and twenty-five 125 five hundred and thirty-four 534,Lets do it!,Match and colour.,twenty-one,forty,sixty-seven,thirty-five,six,eighteen,nine,thirteen,35,21,9,6,18,13,67,40,