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The conservation group said half the mammals that

来源:学生作业帮 编辑:作业帮 分类:英语作业 时间:2024/05/16 05:59:31
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.
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.