Words that go togetherReturn (not return back)
Come or go back; give something back.
Please return the library book by Friday.
Not usual
return back
✗ I will return back the book tomorrow (not usual).
Remember: Return already means "come or give back", so "back" repeats it. Say return, or come back, go back, give back.
Short lessonWords that go togetherSome words naturally team up with certain other words. These partners are called collocations.