drop ;fail ;use ;invent ;thank ;own ;allow ;explore ;的过去式和过去分词是什么?
问题描述：
drop ;fail ;use ;invent ;thank ;own ;allow ;explore ;的过去式和过去分词是什么?
答
drop dropped dropped
fail failed failed
use used used
invent invented invented
thank thanked thanked
own owned owned
allow allowed allowed
explore explored explored