一直坚持用英语怎么说

"一直坚持"用英语可以说成"stick to"，来源于动词"stick"的意思是"粘住"，后加上介词"to"表示坚持做某事。

例句：

I will stick to my plan no matter what happens. (无论发生什么事，我都会坚持我的计划。)
She has been sticking to her exercise routine for the past few months. (她在过去几个月里一直坚持她的锻炼计划。)
He always sticks to his principles, even when it's difficult. (他总是坚持自己的原则，即使很难。)