Only when he had handed in his exam paper did he realize he

Only when he had handed in his exam paper did he realize he had made several mistakes.
为什么不用has he realized
has he realized 和did he realize的区别

teng4587 1年前已收到3个回答举报

手让你来暖幼苗

共回答了19个问题采纳率：84.2% 举报

he had handed 过去完成时态的使用就是要退两步,简单说,在一般过去时态的基础上再向前退一步,现在完成时态属于现在时态范畴,不能直接退到过去完成啊

1年前

回家狂幼苗

共回答了3个问题举报

前者是现在完成时的倒装，后者是一般过去时的倒装

1年前

yclillian 幼苗

共回答了12个问题举报

After Only when he had handed in his exam paper, he had made several1.d 2.a 3.b 4.b 5.d 6. a 7.a 8. d 9. d 10.c 11. a

1年前

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