意思其实是一样的,区别不大
细微的区别是have是现在完成时,表示“现在”已经意识到,而did是过去时,表示过去工作时意识到.
Not until i began to work (did i realize) how much time i had wasted
Not until i began to work (did i realize) how much time i had wasted
为什么不用（have i realized） 它们之间有什么区别
为什么不用（have i realized） 它们之间有什么区别
英语人气：179 ℃时间：2019-08-22 13:32:17
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