How many English songs (learn) by you during these years 空格处用所给词的适当形式填空,
空格处就是 (learn)前面，简述理由，到底是用被动语态还是用完成时？
人气：427 ℃ 时间：2020-04-19 14:59:11
解答
How many English songs have been learned by you during these years ?
在这些年间是一段时间,又对于现在产生影响,所以用完成时,又因为歌是被学用被动
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