Question

求帮忙分析一下这句话的主谓宾和定语从句的结构分析谢谢

Part of stream was so polluted that it was decided it would be best to bury it underground.

Answer 1

此句是一个含有结果状语从句和主语从句的复合句，其中并没有定语从句。
主句：Part of stream was so polluted
结果状语从句：that it was... bury it underground

追答

主句中
Part of stream 主语
谓语 was so polluted

结果状语从句中
形式主语 it
谓语 was decided
(真正)主语(从句)：it would be best to bury it underground

主语从句中
形式主语 it
谓语(系表结构) would be best
(真正)主语 to bury it underground

Answer 2

河流的一部分被污染得很厉害, 所以决定最好把它埋在地下。Part of stream 是主语was 是系动词so polluted 是表语，that it was decided it would be best to bury it underground.以至于……是结果状语从句。其中it是从句中的形式主语，would be best 是最好的意思，相当于would be better

Answer 3

Part of stream 是主语was 是系动词so polluted 是表语that it was decided it would be best to bury it underground.是结果状语从句。其中it是从句中的形式主语would be 是从句中的系动词best 是从句中的系动词to bury it underground.是不定式短语作从句中的真主语。