语法复习二十一:连 词连词分为并列连词和从属连词两大类。并列连词是连接主语与主语,谓语与谓语,句子与句子,分词与分词的词,它要求前后两部分有相同的形式和语法作用;而从属连词一般连接主句与从句,从句形式有名词性从句,定语从句和状语从句等。(一)并列连词:并列连词可用来连接词与词,词组与词组,分句与分句。常用的并列连词有:and(和),as well as(既又),both and(不但而且),not only but also(不但而且),not but(不是而是),neither nor(既不也不),either or(不是就是),or(或者),but (但是),yet(然而),for(因为),so(所以),while(而),when(这时)等。如:Both my brother and my sister are teachers./ His room is bright but mine is gloomy(暗沉沉的)./ He can not only repair radios but also fix them./ It is