l开头的形容词之前
legal illegal logical illbogical
literate illiterate
im-加在以b,m,p开头的形容词之前
possible impossible
mortal immotal
moral immoral
balanced imbalanced
ir-加在以r开头的形容词之前
regular irregular rational irrational
resistible irresistible
in-主要用于其他字母开头的词之前
human inhuman correct incorrect
justice injustice sinca\ere insincere
un-只能手于形容词和动词之前
不
happy unhappy friendly unfriendly
lucky unlucky
无
conditional unconditional limited unlited
非
official unofficial just unjust
未,主要用于过去分词之前
undecided unfinished unexpected unhurt
用于动词之前表示做相反的动作
lock unlock tie untie
cover uncover pack unpack
dress undress load unload
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