The conservation group said half the mammals thathave become extinct globally in the last 200 year have been Australian species.在that引导的定从中真正的动词是什么?是have become 还是have been.如果是其中一个那另一个在句

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Theconservationgroupsaidhalfthemammalsthathavebecomeextinctgloballyinthelast200yearhavebeenAustralia

The conservation group said half the mammals thathave become extinct globally in the last 200 year have been Australian species.在that引导的定从中真正的动词是什么?是have become 还是have been.如果是其中一个那另一个在句
The conservation group said half the mammals that
have become extinct globally in the last 200 year have been Australian species.在that引导的定从中真正的动词是什么?是have become 还是have been.如果是其中一个那另一个在句中做什么成分?请高手指教下.

The conservation group said half the mammals thathave become extinct globally in the last 200 year have been Australian species.在that引导的定从中真正的动词是什么?是have become 还是have been.如果是其中一个那另一个在句
这个句子里面有两个从句,have become是定语从句的动词,have been是宾语从句的动词.
主句：主语conservation group, 谓语said,said后面到句子结尾是从句做宾语.
宾语从句的主语是half the mammals,系动词have been,表语Australian species.
其主语half the mammals 由that引导的定语从句 that have become extinct globally in the last 200 year修饰.

have become是定从中的动词，而have been是主句的动词。
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定从中的谓语动词是 have become. 而 have been是宾从中的谓语动词主句的谓语动词是 said 这句话提主干就是： The group said half the mammals have been Australian species. 定从： that have become extinct globally in the last 200 years. 先行词是 mammals，在定从中作主语。 said 的动作是 group 发出的， have become 和 have been 都是mammals 发出的，但是have become 的前面是that，所以mammals 是间接作have become的主语，真正的主语是that. 而分析 have been 的主语要跳开定从不看，因为定从的位置可以换，你可以把that have become extinct globally in the last 200 years.换成非限定放句末。

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