前缀un:
successful – unsuccessful.
上海龙凤1314 reliable – unreliable.
上海龙凤1314 shaven – unshaven.
important – unimportant.
predictable – unpredictable.
comfortable-uncomfortable.
上海龙凤1314 fortunate-unfortunate.
finished-unfinished.(未完成的.)
上海龙凤1314 doubted-undoubted.(无疑的)
上海龙凤1314 unemployment-unemployment.(失业)
上海龙凤1314 able-unable.
believable-unbelievable.
上海龙凤1314 comfortable-uncomfortable.
abashed-unabashed.(不害羞的)
accessible-unaccessible.(难亲近的)
accountable-unaccountable.(不能说明的)
上海龙凤1314 adjusted-unadjusted.(未调整的)
affiliated-unaffiliated.(非附属的)
healthy-unhealthy.(不健康的)