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可尝试扩展句子。越复杂的句子,分析结果越丰富。
This produced a chain reaction, which made it possible for life to develop.
这是一个复杂句。
This produced a chain reaction, which made it possible for life to develop.
This主语
produced •••谓语动词短语
a chain reaction,宾语
for life to develop.真实宾语
which made it possible for life to develop.
这是一个关系从句,其时态为一般过去时。
which主语
made {it} {宾补} {真实宾语}谓语动词短语
it形式宾语
possible宾补(形容词)
for life to develop.真实宾语