经过很大努力用英语怎么说

用英语表达“经过很大努力”的常用说法是 "after a lot of hard work" 或者 "through a lot of hard work"。这个短语的来源可能源于人们在工作或学习中经常要付出大量的努力来完成任务。

下面是一些例句：

After a lot of hard work, I finally finished my project. (经过很大努力，我终于完成了我的项目。)
Through a lot of hard work and dedication, she was able to earn a scholarship to attend college. (经过很大努力和奉献，她能够获得奖学金上大学。)
It took a lot of hard work and determination to overcome the challenges, but in the end, it was all worth it. (经过很大努力和决心才能克服挑战，但最终，一切都是值得的。)