back then 在下面的句子中是插入语吗?
Sometimes I think how grateful I would be today if I had learned more back then about what really matters.
back then 是两个时间副词,修饰 learned,作时间状语。不可能是插入语。
then (时间副词)= at that time (在那时)
back (时间副词),修饰 then。表示“从现在追忆回到(那时)”。
Sometimes I think how grateful I would be today if I had learned more back then about what really matters.
有时我想,如果我在那时学到了更多真正重要的东西,我今天会多么感激。
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