Three factors have caused - 已解决

Three factors have caused this fish to grow so large:the war

Three factors have caused this fish to grow so large:the warm water round the hot oil pipes under the sea; the plentiful supply of food thrown overboard by the crews on the rigs; the total absence of fishing boats around the oil rigs.

三个因素导致鱼长的非常大：海底热的输油管道附近温暖的海水；钻井平台工作人员抛入海里充足的食物；钻井平台周围根本没有捕鱼船只.

以上是新概念英语第二册lesson 90中的一段话.我想请问的是这段话中的其中一句：the plentiful supply of food thrown overboard by the crews on the rigs 这句是过去式?还是被动语态,如果是被动语态BE + 过去分词+BY,可这里面没有BE,然后就整个句子的型什么做个概述,

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2个回答

pengjigui 说的正确

thrown overboard by the crews 是作定语修饰前面的 .

引导词和BE动词被省略了

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