I take pain over my work.

Explanation

The sentence "I take pains over my work" is grammatically correct because it follows the subject-verb-object structure, where "I" is the subject, "take" is the verb, and "pains over my work" is the object. The phrase "take pains" is an idiom meaning to put a lot of effort or care into something. Additionally, the preposition "over" is used appropriately to indicate the focus or attention given to the work. Overall, the sentence effectively conveys the idea that the speaker is diligent and careful in their work.