We use "through with" to indicate that someone has finished or completed something, or is no longer involved or interested in it.
We use "through with" to indicate that someone has finished or completed something, or is no longer involved or interested in it:
I'm through with my homework, so now I can watch a movie. (Completion of a task)
I am through with trying to organize group events; no one ever shows up on time. (Indicating disinterest)
It can imply the end of an activity, relationship, or involvement in a particular situation:
John is through with the project; he handed in his resignation last week. (Ending of involvement)
After years of arguments, my brother and his girlfriend are finally through with each other. (Relationship context)
The expression "through with" is often used to signify a sense of relief or completion, as well as a decision to discontinue an activity or relationship that may no longer be fulfilling or necessary:
Once this report is submitted, I'm through with this part of the project.