我收获了很多用英语怎么说

"I have gained a lot" 是一种很好的表达方式。来源可以是学习、工作、生活等方面。例如：

English: I have gained a lot of knowledge from reading books.
Chinese: 我通过阅读书籍获得了很多知识。

English: I have gained a lot of experience working in this company.
Chinese: 我在这家公司工作获得了很多经验。

English: I have gained a lot of insight from our discussion.
Chinese: 我从我们的讨论中获得了很多洞察力。