i am surprise that he ( ) in the exam,为什么不用should fail 而用 should have failed

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iamsurprisethathe()intheexam,为什么不用shouldfail而用shouldhavefailediamsurprisethathe()intheexam,为什么不用shou

i am surprise that he ( ) in the exam,为什么不用should fail 而用 should have failed
i am surprise that he ( ) in the exam,为什么不用should fail 而用 should have failed

i am surprise that he ( ) in the exam,为什么不用should fail 而用 should have failed
这里should have done一方面表示时态上的过去,因为考试是过去的事了.另一方面用作虚拟语气,表示惊讶.

表示我不希望这是真的。而用的虚拟语气 should have failed 。

should have failed虚拟时态