How he managed to find us!求解?

How he managed to find us!求解?
How he managed to find us!这是个什么句型?how 引导感叹句吗?可how引导的是句型公式是
How +形容词+ a +名词+ 陈述语序
How+形容词或副词+ 陈述语序
What +名词+ 陈述语序
跟这个句子不搭啊~~
求解~~帮忙分析这个句子~