study的过去分词形式是studied。studied的意思是刻意的，精心安排的。studied的例句：He has not studied mechanics or engineering（他没有学习过力学和工程学）。

studied的例句：Fernandez studied the socioeconomic backgrounds of new recruits（费尔南德斯研究了新成员的社会经济背景）；He studied classical architecture and design in Rome（他在罗马学习了古典建筑学和设计）。