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Jun 17, 2019 - Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. ... <看更多>
Jun 17, 2019 - Enjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube. ... <看更多>
As you say, "started" is a past perfect participle which effectively is an adjective,. The program is started. ... <看更多>
Passed = the past simple tense (past participle) of the verb “to pass.” "Past" is used for everything else. ... <看更多>