not until he went through real hardship___the love we have for our families is important.

题目

not until he went through real hardship___the love we have for our families is important.
这道题的答案为什么不是had he realized 而是did he realize?

答案

had是表示动作发生在过去的过去,而这个句子中,went through表示过去,但是realize的动作是发生在went之后,并不属于过去的过去,所以用did,而不用had.直到他经历了真正的艰难后,他才意识到了我们对家庭的爱是很重要的.