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英语
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The technician __ to find out what is wrong with the generator.
has trying has been trying
人气:497 ℃ 时间:2019-11-18 05:48:51
解答
has been trying
现在完成进行时
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祝学习进步现在完成进行时知道。 为什么要那么用。首先, 英语中没有has trying这一动词形式这里用这个时态,表示这位技术员一直以来就在努力这么做好像是没有have trying 哈 、看错了。不客气
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