- My cousin is very good at martial arts and he also likes to investigate big cases, that's why he wants to apply to Police University. <br/><br/>- My uncle is a good doctor. He always operates the poor for free, but the funny thing is he's kind of afraid of blood.<br/><br/>- Are these two sentences grammatical?<br/><br/>Thanks a lot to Teachers,<br/><br/>Namsteven