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    • we have never had any disease or insect attack problems. 为什么是have never had？

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    推荐答案   推荐于2017-07-01
    前一个have是助动词，构成完成时态。
    后一个had是实义动词，意思为遭受。追问

    have的过去分词是had？

    have的过去分词是had？

    追答

    是的。

    温馨提示：答案为网友推荐，仅供参考
    其他回答
    第1个回答  2016-12-31
    这是现在完成时，表示从现在往前的时间都没有。
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