英语人教版五年级下册小学英语基数词变序数词微课.ppt

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1、基数词变序数词向塘镇丁坊小学李菁教学目标：让学生掌握如何将基数词变成序数词，理解并记忆口决。老师，基数词怎么变序数词？基数词变序数词数词分为基数词和序数词表示数目多少的词叫基数词（one,two,three,four,...,翻译为1,2,3,4,......）表示顺序的词叫序数词（first,second,third,fourth...翻译为第一，第二，第三，第四......）基数词变序数词foursixseventenfourthsixthseventhtenth基变序，有规律，结尾都加“th”onetwothreefirstseco

2、ndthird一二三需特记，结尾带有t、d、d基数词变序数词eightnineeighthninth八减t,九减e,再加thfivetwelvefifthtwelfthve要用f替,再加th基数词变序数词twentythirtyfortyfiftysixtyseventyeightyninetytwentieththirtiethfortiethfiftiethsixtiethseventietheightiethninetieth字母“ty”作结尾，“ty”变成“tie”,再加th基数词变序数词twenty-oneforty-eight

3、sixty-nineeighty-fourninety-threetwenty-firstforty-eighthsixty-nintheighty-fourthninety-third若遇到几十几，只变个位就可以末尾加th,first，second，third，特殊记，th,四加起,(four—fourth)八去t,(eight—eighth)九去e,(nine—ninth)ty结尾改tie.(twenty—twentieth)ve结尾变f,five,twelve是两兄弟。,(five—fifth,twelve—twelfth)若是遇到

4、几十几，只变个位就可以。(twenty-one——tweenty-first)基数词变序数词有规律：谢谢大家！