请问 + Question
请问 means "may I ask" and is used to politely introduce a question. It combines 请 (please) with 问 (to ask), softening the directness of the inquiry. Place it at the beginning of a question to show courtesy.
请问,去火车站怎么走?
Qǐngwèn, qù huǒchē zhàn zěnme zǒu?
Excuse me, how do I get to the train station?
请问,这个座位有人吗?
Qǐngwèn, zhège zuòwèi yǒu rén ma?
Excuse me, is this seat taken?
请问,现在几点了?
Qǐngwèn, xiànzài jǐ diǎn le?
Excuse me, what time is it now?