The phrase "after I studied" is correct and usable in written English.
It can be used to indicate a time sequence, referring to an event that occurred following the act of studying.
Example: "After I studied for the exam, I felt more confident about my knowledge."
Alternatives: "following my study session" or "subsequent to my studying".
It was after I studied abroad that I calmed down.
After I studied electrical engineering, I wanted to be a movie director.
After I studied English, I began to read those books in English.
I chose to wear it myself after I studied Islam and thought it was a beautiful way to express my love for my religion and nothing more.
After I studied for eight semesters, I got stuck in the exams procedure for 8 months, because the correction of the exams took 7 months and then it took another month of waiting for the oral exams.
I was in Italy four years ago, and after I studied ten years, I was working in my family company.
Furthermore, our results show that ∼50% of the Matched students agree with statements such as: "After I study a topic in biology and feel that I understand it, I have difficulty applying that information to answer questions on the same topic" and "When I am answering a biology question, I find it difficult to put what I know into my own words".
Problem-Solving Sophistication differentiates itself from the other problem-solving categories with such statements as: "If I want to apply a method used for solving one physics problem to another problem, the problems must involve very similar situations" and "After I study a topic in physics and feel that I understand it, I have difficulty solving problems on the same topic".
Although the directorate is male-dominated, I don't find this a problem--after all, I studied physics!
After all, I studied English literature, too.
After all, I studied mental illness, not marketing.
