to 부정사에 대한 chat GPT 답변

제가 공부하는 podcast에 다음과 같은 문장이 있어서 chat GPT에 문의했더니 다음과 같은 답변이 있었습니다. All I have to do is clean my room. 질문 : Which is correct 'All I have to do is clean my room' or ' All I have to do is to clean my room' 답변 : Both of the sentences are grammatically correct, but the first sentence "All I have to do is clean my room." is more commonly used in modern English. The second sentence "All I have to do is to clean my room." is also correct, but it includes an additional "to" before the verb "clean," which is not strictly necessary in this context. So, you can use either sentence, but the first one without the extra "to" is more natural and commonly used. 문법적으로 맞다는 걸 이해할 수 없습니다.