A <i>yes-no</i> question is a question that can be answered by either <i>yes</i> or <i>no</i>.

<br><br>A 'yes' value indicates that the language has a particle used to indicate that the sentence is a <i>yes-no</i> question. An example is Bulgarian, which uses the particle <i>li</i>, as in <i>Vidja <b>li</b> go?</i> 'saw.3sg <b>Q</b> him.ACC' for 'Did (s)he see him?' (Rudin et al. 1999).

<br><br><b>Glossing convention:</b> Yes-No question particles will be glossed Q. 

<br><br><b>Reference</b><br>
Rudin, C., C. Kramer, L. Billings and M. Baerman. 1999. Macedonian and Bulgarian li Questions: Beyond Syntax. <i>Natural Language & Linguistic Theory 17</i> (3):541-586.