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

learn learning 学问 learner learned博学的 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 ~

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