Hi,<br/><br/>I was wondering if you could tell me the part of speech of "but" in the following sentence:<br/>It is not our teacher but you who are to blame.<br/><br/>I think "but" is conjunction and before "you" "it is" is left out.<br/>Is this correct?<br/><br/>So, the above sentence is the same as follows:<br/>It is not our teacher but it is you who are to blame.<br/><br/>Thanks in advance.