Tā / guòqù / hěn / shǎo / xuéxí / hòulái / wèile / gǎibiàn / zìjǐ / ér / zhéjié / dúshū

他过去很少学习，后来为了改变自己而折节读书。

He used to study very little, but later changed his ways and devoted himself to studying.