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英语
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i was reading my book when the phone ring是什么语法?
还有过去完成时和现在完成时的用法和区别一直搞不明白 什么时候用have/has+done 什么时候用had+done
麻烦详细解释一下
人气：190 ℃ 时间：2019-11-11 12:56:48
解答
was reading 是过去正在进行时,现在已经完成的了用have/has+done ,过去就已经完成的了用had+done.
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