作业帮解释一下该句子的时态Since he came here last year, we have been happy.解
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解释一下该句子的时态
Since he came here last year, we have been happy.
解释一下主句和从句之间时态的判断.
Since he came here last year, we have been happy.
解释一下主句和从句之间时态的判断.
这是一个现代完成时句子.
我便一下你就明白了：
We have been happy since he came here last year.
自从他去年来这,我们很高兴.
句子解析为：
主语（we）+have/has+过去分词（been）+since+时间点（ he came here last year）.
注意,这里的he came here last year 是一个时间点（他去年到这的时候）.
我便一下你就明白了：
We have been happy since he came here last year.
自从他去年来这,我们很高兴.
句子解析为：
主语（we）+have/has+过去分词（been）+since+时间点（ he came here last year）.
注意,这里的he came here last year 是一个时间点（他去年到这的时候）.
解释一下该句子的时态Since he came here last year, we have been happy.解
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