participle:the form of a verb that in English usually ends in “ed” or “ing” and is used as an adjective. 分词:动词的形式，在英语中通常以“ed”或“ing”结尾，用作形容词。
比如:Thanks to your help， we were successful.由于你的帮助， 我们得以成功.Thanks to the automobile， Americans soon had a freedom of movement previously unknown.由于有了汽车，美国人很快就获得了前所未有的行动自由。
