Hi,<br/><br/>Is the following sentence is correct?<br/><br/><span style="color:rgb(255,0,255);">I should have been studying</span><br/><br/>I think the above should be as:<br/><br/><span style="color:rgb(255,0,0);">I should have been studied </span><br/><br/>or<br/><br/><span style="color:rgb(255,0,0);">I should have been studying for little longer time.</span><br/><br/>Am I correct?