使用前缀un-,in-,im-,dis-,ir-来构成形容词的反义词:
a.大多数形容词前面加un构成反义词,如:
happy-unhappykind-unkindtrue-untrueable-unablecomfortable-uncomfortablefriendly-unfriendly
b.以c开头的形容词用前缀in-构成反义词,如:
correct-incorrect
c.以p开头的形容词用前缀im-构成反义词,如:
possible-impossiblepolite-impolite
d.以r开头的形容词用前缀ir-构成反义词,如:
regular-irregular
e.有些形容词用前缀dis-构成反义词,如:
honest-dishonestagreeable-disagreeable