Unit 16 The United States of America学习指导

一、词汇过关1.pain【用法】1)名词,意为“疼痛”,表示身体局部的疼痛,其前一般用不定冠词,也可用复数。例如:M ary is crying because she has a painin her stom ach.玛丽胃痛得哭了起来。She had pains in her back all thetim e.她背部一直痛。2)pain表示“痛苦”时,是不可数名词。例如:Y ou w ill forgive m e if I have givenyou pain.如果我让你痛苦,请你原谅我。The pain in her heart was intolerable.她内心的痛苦简直无法忍受。3)pain作“烦恼,辛苦,费心,努力”解释时要用复数形式。例如:H e is a good teacher and takes gre…