动名词和名词化的动名词

Knowing someone may look over you shoulder can keep you honest.

这句话knowing是目前分词还是动名词？能否在knowing后面加of？

can keep you honest 需要一个主句。你在前面找主语，只有knowing someone may look over your shoulder 大概作主语。你说knowing是动名词还是目前分词。