<p><span style="color:#000000;">Q: How long have your teeth been</span><span style="color:#ff0000;"><span style="color:#000000;"> (</span><i>hurt/hurting</i><span style="color:#000000;">)?</span></span></p><p><span style="color:#ff0000;"><span style="color:#000000;">A: They have been (<span style="color:#ff0000;"><i>hurt/hurting</i></span>) since yesterday morning.</span></span></p>