呢【ne】

ne呢 after a noun or pronoun asks the question that was just asked, about someone or something else. The rest of the sentence drops because it has already been said.

What 呢 carries over is whatever was just said, a question or a statement. After 我叫马克, 你呢 means "and what's your name?".

Asking where something is

With nothing said before it, noun + 呢 asks where that person or thing has got to.

呢 or 吗

呢 does not turn a statement into a yes/no question; that is 吗's job. Apart from the follow-up use above, 呢 only goes on the end of a sentence that is already a question – one with a question word or an A-not-A form – and softens it.

• × 你是学生呢？ → 你是学生吗？