Did you say...?, Pardon?, You said...?, Asking for clarification
This expression is used when asking for clarification or reconfirmation of what another person has just said. The speaker repeats what the other person just finished saying as a way of asking for clarification about something that was not understood clearly or that was hard to believe. For this reason, the form of the expression depends on the form in which the first speaker originally made the statement. Then, because the speaker is asking the other person for clarification, the particle 요 is added to the end of the indirect citation form.
For adjectives in the present tense, both -냐고요? and -으냐고요? are acceptable, while for verbs in the present tense, both -냐고요? and -느냐고요? are acceptable.
1. The citation form for propositive sentences should be used when responding to a suggestion ending in -(으)ㄹ까요?
2. This expression can also be used by a speaker to restate or emphasize what he or she has previously said.