这些单词的过去分词.

题目

这些单词的过去分词.
BUY
get
take
swim
begin
play
enjoy
eat
walk
dance
run
find
study
过去分词.

答案

buy-bought get-got take-took swim-swam begin-began play-played enjoy-enjoyed eat-ate walk-walked dance-danced run-ran find-found study-studied过去分词,不就是就是过去式的过去式么