I used to know how i use "yet" until i saw sentences like these: <br/><br/>"The best is yet to come"<br/>"the best is yet to unfold"<br/><br/>I don't get their meaning <img class='emoticon' style='Width:19px;Height:19px;' data-delaysrc='https://uat-englishforward-forums-backend.s3.us-west-2.amazonaws.com/Emoticons/1.gif' src='https://uat-englishforward-forums-backend.s3.us-west-2.amazonaws.com/Emoticons/1.gif' alt='Emotion: smile'/><br/>can you tell me all the "yet" uses?<br/>Thanks!