4.2.3　★★★词形变换★★★

1.listen v.听→listener n.听众

2.quiet adj.安静的→quietly adv.安静地→quietness n.安静

3.important adj.重要的→importance n.重要性→importantly adv.重要地→unimportant adj.不重要的

4.dirty adj.脏的→dirt n.泥土；污垢(https://www.daowen.com)

5.noisy adj.吵闹的→noisily adv.吵闹地→noise n.噪音

6.relax v.放松；休息→relaxing adj.令人放松的→relaxed adj.感到放松的

7.luck n.幸运；运气→lucky ad j.幸运的→luckily ad v.幸运地→unlucky ad j.不幸运的→unluckily adv.不幸运地