feel stress/stressed/stressful有什么不同?我们老师说stress是形容人的.stressful是形容物的.是这样的吗?

你老师是对的. 因为stressFUL...那个是个描述词...是用来描述某样东西是给于你压力的.
beautiful = she is a beautiful girl.
beauty = I can see the beauty of this situation.
至于, stress是形容人的..那就不了. stress 还可以形容别的东西.
"the weight of the snow puts stress on the branches of the tree."
看你怎么用而已. 当然; 初学者; 最好就只用来形容人就好了.