常见的带有否定词义的词语：never , seldom , hardly , few , little , barely , scarely , rarely , nothing , none , no , not , no one , nobody , neither...
含有 "think , believe , suppose , imagine , expect"等动词接宾语从句所构成的反义疑问句的用法（主句的主语为第一人称）
前肯后否，助动词看从句助动词：eg. I suppose (that) you have finished your homework , haven't you ?
前否（否定含义转移到主句时）后肯，助动词看从句助动词：eg . I don't think (that) he will read this book , will he ?
