I don't know how you want me to smile.
you want my teeth to go in front of my teeth.
这里的to go 怎么理解?什么意思?
to go in front of my teeth是动词不定式短语,作宾语补足语。you want my teeth to go in front of my teeth的意思可能是:“你要我的(一些)牙齿放在(另一些)牙齿的前面。” (仅供参考)