wǒ / jué / de / nǐ / hěn / miàn / shú / wǒ / men / shì / bú / shì / yǐ / qián / zài / nǎr / jiàn / guò

我觉得你很面熟，我们是不是以前在哪儿见过？

You look very familiar to me. Have we met somewhere before?