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have 的过去式和过去分词形式

教育经验

have 的过去式和过去分词形式

have的过去式 had；过去分词 had；

havev.有；持有；占有；由…组成；显示出

Had I known that I would never have come.

要是早知道，我绝不会来的。

He had to go to hospital for treatment.

他不得不去医院接受治疗。

We had to work within the parameters that had already been established.

我们必须在已设定的范围内工作。