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【答案】
3rd-third first-1st 12th-twelfth nineteenth-19th
20th-twentieth twenty-eight-twenty-eighth
80th-eightieth eleventh-11th
29th-twenty-ninth twelfth- 12th
do--doing jump--jumping dance--dancing play--playing
go--going talk--talking swim--swimming run---running
take--taking give--giving
【解析】注意动词ing形式的变法
1)一般情况下直接加ing think---thinking sleep---sleeping
study---studying speak---speaking
carry---carrying say---saying
2)以不发音的字母e结尾的单词,去掉字母e,再加ing
wake---waking make---making come---coming
take---taking leave---leaving have---having
3)以重读闭音节结尾,呈现“辅,元,辅”结构的动词,先双写末尾的辅音字母,再加ing 。
4)以 y 结尾的动词 直接加 ing
carry—— carrying enjoy—— enjoying
5)以ie结尾的动词,把ie改为y ,再加ing
die---dying lie---lying