在记忆和背诵考研单词时，很多人会推荐词根词缀法记忆单词，因为这种方法科学合理，记忆牢固并且迅速。那么，今天小编就跟大家分享一下前缀系列之反义否定。
1、a-/an- (not，without否定)
apo1itical a. 不关心政治的
e.g. Henry used to be totally apolitical, but I think he is now politically more aware. 基辛格过去完全不问政治, 但是,我认为现在他政治上比较敏锐了.
anonymous a. 匿名的，无名的，不知名的
e.g. She's got too much dignity to descend to writing anonymous letters. 她是个自尊心很强的人，绝不会自贬身份去写匿名信。
2、a-/ab-/abs- (在"t""v"之前)( avoid避免)
abstain v.弃权，戒
e.g. They say it would be political suicide for the party to abstain. 他们说这个政党弃权无异于自毁政治前程。
abstract v. n. 摘要
e.g. His painting went through both representational and abstract periods. 他的绘画经历了具象风格和抽象风格两个阶段。
3、ant- (against /opposite"反抗""反""抗")
anti-government 反政府的
e.g. Mr Cramer said the violence by anti-government protestors was reprehensible. 克拉默先生说反政府示威者的暴力活动应该受到谴责。
antisocial 反社会的
e.g. Toddlers are notoriously antisocial when it comes to sharing toys. 众所周知，刚学会走路的孩子不愿和别人分享玩具。
4、counter-/contra- (against，opposite反，对应)
contrast 对比，对照
e.g. The boy's room is a complete contrast to the guest room. 这个男孩的房间和客房截然不同。
counteract 抵抗
e.g. My husband has to take several pills to counteract high blood pressure. 我丈夫不得不吃几片药来降压。
5、de- away，down，negative离开，分，否定，使低下
decompose v. 分解, 腐烂
e.g. Most animals decompose very quickly after death. 大多数动物死后很快腐烂.
degenerate v. 堕落
e.g. Will too much freedom make them degenerate? 太多的自由会令他们堕落吗 ?