there are in this class 20 students,the background of them different分析一下这个句子是独立主格结构吗,

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there are in this class 20 students,the background of them different分析一下这个句子是独立主格结构吗,

there are in this class 20 students,the background of them different分析一下这个句子是独立主格结构吗,
there are in this class 20 students,the background of them different分析一下这个句子
是独立主格结构吗,

there are in this class 20 students,the background of them different分析一下这个句子是独立主格结构吗,
There are in this class 20 students,the background of them different.是独立主格结构,There be 句型表示“某地有某物”,后面的名词是句子的主语,就是说:该句的主语是20 students;逗号后的主语是名词the background of them,与前边的主语不同,其后加形容词different,相对于前半句,共同构成了独立主格结构