分析句子成分Some of the bigger firms are engaged in researches whi

来源：学生作业帮编辑：作业帮分类：英语作业时间：2024/07/05 17:22:19

分析句子成分
Some of the bigger firms are engaged in researches which are of such general and fundamental nature that it is a positive advantage to them not to keep them secret.which are of中of怎么理解?that it is a positive advantage to them not to keep them secret这句又是什么从句?which是不是定语从句?先行词什么?
谓语到底是什么啊？我觉得也是被动语态啊

Some of the bigger firms are engaged in researches:主句（firms 是主语,are engaged 是谓语,是被动语态,in researches是状语）
which are of such general and fundamental nature ：定语从句,作定语修饰的成分,先行词是
researches
that it is a positive advantage to them not to keep them secret：定语从句中的同位语从句
谓语是对主语动作或状态的陈述或说明,指出“做什么”、“是什么”或“怎么样”.谓语动词的位置一般在主语之后.
谓语分为简单谓语和复合谓语
复合谓语可分为两种情况：第一种是由情态动词,助动词+不带to的动词不定式构成的重复谓语：例如What does this word mean?
第二种是由连系动词+表语构成的复合谓语.例如：　　You look the same.你(们)看起来一样.

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