Hi. Please help. Which is correct for the sentence sets below?<br/><br/><i>Never tired of doing this.</i><br/><br/><i>Never be tired of doing this.</i><br/><br/><i>He never tires of doing this.</i><br/><br/><i>He is never tired of doing this.</i><br/><br/><i>He never tired of doing this.</i><br/><br/><i>He was never tired of doing this. </i>