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分析长难句句子结构Estimates indicate that the aquifercontains enough

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分析长难句句子结构
Estimates indicate that the aquifer
contains enough water to fill Lake Huron,but
unfortunately,under the semiarid climatic conditions that presently exist in
the region,rates of addition to the aquifer are minimal,amounting to about
half a centimeter a year.(TPO 3)
Analysis-
主语:
谓语:
宾语:
其他成分:
还有这个
Many ecologists now think that the relative
long-term stability of climax communities comes not from diversity but from the
“patchiness” of the environment,an environment that varies from place to place
supports more kinds of organisms than an environment that is uniform.(TPO 3)
Analysis-
主语:
谓语:
宾语:
其他成分:
首先,第一句是个复合句,but连接前后两个完整的句子,表达一种转折的语意.前面一个分句的主语是estimates,谓语是indicate,宾语是一个that引导的宾语从句;后面一个分局,rates (of addition to the aquifer)是主语,are(be动词)作系动词,后面的minimal是表语,under the semiarid climatic conditions that presently exist in the region和amounting to about half a centimeter a year都是状语,unfortunately也是状语
其次,第二句根据语意,an environment that varies from place to place supports more kinds of organisms than an environment that is uniform是补充解释前面the environment的状语,主句在前面.many eclolgists是主语,think是谓语,后面又是一个that引导的宾语从句
如果还是不懂,可以继续追问我
再问: 两句是转折,不是后句是主句么
再答: 你要搞清楚简单句、复杂句和主句、从句的区别。复杂句是由一个以上完整的简单句,中间用and、but等连词连接(当然还有not only...but also...等固定表达),两个句子在语法地位上是平等的。 而你说的主句、从句,则是另一个概念。主句占据主导,从句只是整体上作为主句的某一个成分 这里很清楚,but连接了前后两个句子,两个句子都有完整的句式结构,表达一种转折的意思
再问: 明白了,谢谢
再答: 说错了,是复合句,不是复杂句,不好意思