问题标题:
ifyou()遗忘youhomeworkathome,whatwouldyoudo?()填left,请问像这种“主将从现”的从句中填过去式的情况有那些?
问题描述:

ifyou()遗忘youhomeworkathome,whatwouldyoudo?

()填left,请问像这种“主将从现”的从句中填过去式的情况有那些?

蒋书运回答:
  if的虚拟语气:   if+did(now)sth,sbwoulddo.   if+haddone(past)sth,sbwouldhavedone.   if+did/shoulddo,sbwoulddo.
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