Hi teachers,<br/><br/>Could yoy answer me a couple of questions please?<br/><br/>Baxter's chief <u><b>is nooding</b></u> his head.<br/><br/>a) Could this be an explanation to the previous sentence? If not, could you tell me a suitable one?<br/><br/>Baxter's chief<u><b> is moving</b></u> his head <b><u>up and dow</u></b>.<br/><br/>b) Is there an opposite verb for 'nod'?<br/><br/>Thanks in advance