Evaluate the given sentence and note its grammatical correctness.
Input: I have been went to a movie.
The given sentence is grammatically incorrect. The correct sentence is: "I have been going to a movie." The verb "went" should be changed to "gone" to reflect the action of the sentence.
This sentence is grammatically incorrect. The correct sentence is: "I have gone to a movie." The verb "went" should be changed to "gone".