"他还在坚持" 用英语可以表达为 "he is still persisting" 或者 "he is still sticking to it".
来源: "persist" 是动词，意思是 "坚持，持续"。例如：
Despite the difficulties, she persisted in her efforts to learn the language. (尽管有困难，她仍然坚持学习这门语言。)
"stick to" 也是一个动词短语，意思是 "坚持，固守"。例如：
He stuck to his plan and eventually succeeded. (他坚持他的计划，最终成功了。)
来源: "persist" 是动词，意思是 "坚持，持续"。例如：
Despite the difficulties, she persisted in her efforts to learn the language. (尽管有困难，她仍然坚持学习这门语言。)
"stick to" 也是一个动词短语，意思是 "坚持，固守"。例如：
He stuck to his plan and eventually succeeded. (他坚持他的计划，最终成功了。)