have been sighted 是完成时态的被动语态 被看见的
have 是复数 说明 前面的名词表示复数含义 所以 后面用 are
these fish which have at times been sighted are simly strange fish
these fish which have at times been sighted are simly strange fish
中的been sighted are .怎么理解
中的been sighted are .怎么理解
英语人气：891 ℃时间：2019-09-13 19:21:17
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