I cannot conceive what it <b><i>must</i> </b>be like.<br/><br/>In which sense, is <b><i><u>must</u></i></b> used in this sentence?<br/>please see : <a href="http://oald8.oxfordlearnersdictionaries.com/dictionary/must"><a href='http://oald8.oxfordlearnersdictionaries.com/dictionary/must' target='_blank' rel='nofollow'>http://oald8.oxfordlearnersdictionaries.com/dictionary/must</a> </a>