像这样,当是动词时act,当是名词时action,当是人物时actor,当是形容词时active,3Q

1.invent 名词:invention,人物:inventor,形容词:inventive,副词:inventivly 2.use 名词:usage,人物:user,形容词:useful / useless,副词:usefully / uselessly 3.operate 名词:operation,人物:operator,形容词:operative / operational,副词:operativly 4.dream 名词:dreamland / dreaminess,人物:dreamer,形容词:dreamy / dreamless,副词:ly 5.live 名词:life,人物:liver,形容词:living /lively,副词:livelily 6.play 名词:life,人物:liver,形容词:living /lively,副词:livelily 二零一零-07-16 17:58 能不能再多一点（不多的意思）句号.还差一点（不多的意思） 二零一零-07-16 18:52 learn learning 学问 learner learned博学地 learnedly write writing writer written ly dress dressing dresser dressed / dressy ly run running runner runny / running ly clean cleaning cleaner clean ly please pleasure -- pleasant / pleasing ly 必须是名词、人物、形容词、副词四种变化都有吗（问的意思） 有很非常多只有三种变化 只清楚的知道这么多了句号.希望能帮到你句号.二零一零-07-16 18:57 行的意思可以只有三个