ā / yo / nǐ / zěn / me / tū / rán / chū / xiàn / zài / wǒ / shēn / hòu / xià / le / wǒ / yí / tiào

啊哟，你怎么突然出现在我身后，吓了我一跳！

Oh! How did you suddenly appear behind me? You gave me quite a scare!