1、a-
① 加在单词或词根前面，表示不，无，非
amoral 非道德性的
apolitical. 不关政治的
atypical 非典型的
② 加在单词前，表示在，的
asleep 睡着的
astray 游离的
上一篇： SAT词汇讲解之前缀：counter-
下一篇： SAT词汇讲解之前缀：-dem
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