问题描述：
英语高手请进来
连词成句：father in a .Tom’s works hospital
找规律,写单词：
first second thirsd fourth；fifth ()()()；ninth ()()twelfth；thirteenth()()()；()()nineteenth.
基数词变序数词口诀：基变序,很容易,多数基数词加th；第一、二、三要注意,结尾各是t,d,d；8减t来,9减e,－ve要换成f；－y要变成ie,结尾再加th；如果遇到几十几,只变个位就可以.
连词成句：father in a .Tom’s works hospital
找规律,写单词：
first second thirsd fourth；fifth ()()()；ninth ()()twelfth；thirteenth()()()；()()nineteenth.
基数词变序数词口诀：基变序,很容易,多数基数词加th；第一、二、三要注意,结尾各是t,d,d；8减t来,9减e,－ve要换成f；－y要变成ie,结尾再加th；如果遇到几十几,只变个位就可以.
问题解答：
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