jenny promised to come early but she has not( turned up )yet为什么是turned up 加ed

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jenny promised to come early but she has not( turned up )yet为什么是turned up 加ed
jenny promised to come early but she has not( turned up )yet为什么是turned up 加ed

jenny promised to come early but she has not( turned up )yet为什么是turned up 加ed
has done
turn是动词,用在完成时中,应变成 过去分词 turned
turn--turned--turned