what interested me most is it interesting sights中为什么用interes

这是由What引导的名词性从句,在句中作主语,
interested当成半使役动词来使用,

半使役动词的主动式用法：something + Vt. + somebody
如：What surprised him most was her bravery
What caused his death? 什么导致了他的死亡?

What interested me most…… 翻译成：
“什么东西使我最感兴趣”或“最令我感兴趣的是……”
interested去掉ed后,
What interest me……翻译成：
我对什么感兴趣

what interests me most is its interesting sights
what interested me most was its interesting sights

注意一下时态，楼上就对了

过去式表示已经发生的事情，翻译：刚刚使我感兴趣的事情是。。。