例句：

　　Please, sir, can I open a window?

　　老師，請(qǐng)?jiān)试S我打開(kāi)一扇窗戶好嗎？

　　Please could I leave early today?

　　請(qǐng)問(wèn)，我今天早走一會(huì)兒行嗎？

　　What's your account number please?

　　請(qǐng)問(wèn)你的賬戶號(hào)碼？

　　Please could you speak more slowly?

　　請(qǐng)您說(shuō)慢一點(diǎn)好不好？