seemto主谓宾分析句子成分Petroleum,consistingofcrudeoilandnaturalgas,seemstooriginatefromorganicmatterinmarinesediment.

问题：seemto主谓宾分析句子成分Petroleum,consistingofcrudeoilandnaturalgas,seemstooriginatefromorganicmatterinmarinesediment.

答案：↓↓↓

杜友田的回答：

网友采纳　　主语：petroleum　　系动词：seems　　表语：tooriginatefrom...　　定语：consistingof...（现在分词作定语修饰petroleum,相当于whichconsistsof...）　　意思：　　石油（包括原油和天然气）似乎是沉淀在海底的有机物变成的.