not only与but also后面所连接的词的词性必须对等：
(1) Frankin was considered not only an inventor,but also a statesman.富兰克林不仅被看作发明家,而且被看作政治家.
(2) The nurse was not only competent but also kind.这位护士不仅能干而且亲切和蔼.(3) They not only broke into his office and stole his books,but also tore up his manuscripts.他们不仅闯进他的办公室,偷走了他的书,而且还撕掉了他的手稿.
not only放在句首,后接句子时要用倒装结构：
(1) Not only should proletarians emancipate themselves but also the whole mankind.无产者不仅要解放他们自己,而且要解放全人类.
(2) Not only does television appeal to those who can read but to those who can't.电视不仅吸引阅读的人,而且也吸引了不会阅读的人.
