The road is covered with snow.I can not understand why they inist on goinf by motorbike.

问题描述:

The road is covered with snow.I can not understand why they inist on goinf by motorbike.
帮我分析一下这个句子,

The road(主语) is covered with(谓语) snow(宾语).I(主语) can not understand(谓语) why they insist on going by motorbike(从句作宾语).
why(状语) they(主语) insist on(谓语) going by motorbike(动名词作宾语)
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