A gust of wind swept the bed off the roof and sent it crashing into the courtyard below

问题描述:

A gust of wind swept the bed off the roof and sent it crashing into the courtyard below
这句话中sent it crashing into the courtyard below我不是很明白,其中的主谓宾怎么区分,还有 crashing 在这里做什么成分,是现在分词做宾补吗?

不是很清楚吗.sent 谓语 it 宾语 crashing into the ...宾补