on多用於系統論述或專題講演、論著等,具有學術性,如：The teacher told us a story about Lei Feng.It"s very moving.He will give us a talk on the history of the Party.他將給我們做個關於黨史的報告.
正誤例析 今天下午我們將聽一個關於非洲歷史的演講.
誤：We"re going to listen to a lecture about African history his afternoon.
正：We"re going to listen to a lecture on African history this afternoon.
簡單區分,about通俗大眾；on學術【專業】性強
on與about 二者都是介詞,意為“關於,論及”等,一般情況下,二者可以互相替換,但二者有點區別：about常用於簡單的或淺顯的論述等,是一般用語,多用於講故事,談話；思考等；
on多用於系統論述或專題講演、論著等,具有學術性,如：The teacher told us a story about Lei Feng.It"s very moving.He will give us a talk on the history of the Party.他將給我們做個關於黨史的報告.
正誤例析 今天下午我們將聽一個關於非洲歷史的演講.
誤：We"re going to listen to a lecture about African history his afternoon.
正：We"re going to listen to a lecture on African history this afternoon.
析：介詞about和on都可以作“關於”解.on表示一本書、文章或演講是嚴肅的、學術性的,可供專門研究這一問題的人們參考；about則表示其內容比較通俗,一般人都可閱讀.