they have been trying to find out how the fire began.句子成分怎么分

they have been trying to find out how the fire began.句子成分怎么分...?how the fire began是find out的宾语,那从整个句子来看成分怎么分呢?谢谢.

prosody 1年前已收到2个回答举报

sadzixi 幼苗

共回答了12个问题采纳率：91.7% 举报

主谓宾 [ 宾语从句]
（they ）（have been trying）（to find out [how the fire began].）
to find out how the fire began 动词不定式在整个句子中作宾语

1年前

jing_815 幼苗

共回答了32个问题举报

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