非谓语动词中过去分词与不定式的被动式的区别

done
表示被动,发生在主句谓语前一般不与for短语连用,例：work
finished,they
went
home.做完公作发生在回家前,
to
be
done被动发生在主句谓语之后,
例：Work
to
be
done,he
went
to
his
office
先去办公室在做公做,