Antonyms for the phrase "carries back" could include "leaves behind," "abandons," or "forgets." To carry something back implies a retrieval or return to the original location or state, so antonyms would involve a departure or abandonment of some sort. Another possible antonym could be "moves forward," as carrying something back suggests a backwards movement, whereas moving forward would indicate progress or advancement. Ultimately, the choice of antonym would depend on the specific context and intended meaning of the phrase "carries back," as different situations may require different opposing ideas or concepts.