跪求5个英语中的同根词!十万火急!

问题描述:

跪求5个英语中的同根词!十万火急!
三个词(名词、形容词、副词)
如 care(名词)—careful(形容词)—carefully(副词)
列举5个即可,十万火急!

help-helpful-helpfully
use-useful-usefully
frequence-frequent-frequently
independence-independent-independently
difference-differente-differently