based on就是基於，根據的意思，based on research基於研究等.
base
on放句首是不是一定要固定用based on?
1、base on放在句首時，一般是要用based on的.
如：Based on a true story，the novel is
popular soon.
2、原因：因爲base on放句首一般做狀語，而句子的主語是做base的賓語的.
即構成固定短語：base + 句子主語
+
on...，意思是“把...（句子的主語）建立在...（on後的賓語）上”.
所以句子主語和base之間一般是被動關係，所以此時必須使用其過去分詞based.
3、例句中即：base
the novel on a true story.
base on be based on如何區別，怎麼用
Ⅰ on “以……爲根據”，用法應是 base A on B如：
① Edison based his ideas on scientific experiment.愛迪生的想法是建立在科學實驗的基礎上的.
② You should base your opinion on facts.你的意見都要以事實爲根據.
Ⅱ based on “以……爲根據” “根據……”“基於……”用法是A be based on B
① What he said is based on fact.他所說的話是以事實爲根據的.
② The story is based on real life.那故事是根據現實生活而寫的
