(1)动词转化为名词，、post-postage、mail-mail、weigh-weight、advise-advice
(2)动词转化成名词-形容词、act-actor、/、actress-active、change-change-changeable
(3)动词转化成形容词，副词，名词、fill-full，need-necessary-necessarily、interest(v.、/、n.)、interested、/interesting
(4)名词转化为形容词、person、personal、(、个人的.;、私人的、)、fun、funny
(5)名词转化为名词复数、gentleman、gentlemen、human、humans
(6)形容词转化为副词、possible、possibly、probable、probably
(7)形容词转化为副词，名词、true、truly、truth、lucky、luckily、luck