not hear的过去式
过去式是did not hear，例如： 1.He called out to me but I did not hear him.他大声叫喊，但我没听见。 2.Deep in thought, he did not hear the doorbell ring.他陷入沉思之中，没听见门铃响。 3.We did not hear a peep out of the baby all night...
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过去式是did not hear，例如： 1.He called out to me but I did not hear him.他大声叫喊，但我没听见。 2.Deep in thought, he did not hear the doorbell ring.他陷入沉思之中，没听见门铃响。 3.We did not hear a peep out of the baby all night...
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