He was all but killed by the traffic accident ,which I think happened by no accident .谁能帮我划分一下句子成分.

He was all but killed by the traffic accident ,which I think happened by no accident .谁能帮我划分一下句子成分.
He was all but killed by the traffic accident ,which I think happened by no accident .
谁能帮我划分一下句子成分.

He was all but killed by the traffic accident ,which I think happened by no accident .谁能帮我划分一下句子成分.
He（主语） was all but killed by the traffic accident （谓语）,which I think happened by no accident （非限制性定语从句）.
非限制性定语从句成分：
which（关系代词作宾语从句中的主语） I （主语）think（谓语） happened by no accident .