https://www.englishgrammar.org/do-vs-have-exercise/ Do vs. Have | Exercise Fill in the blanks with a form of do or have. Answers I did invite her, but she didn’t come. I don’t think that we www.englishgrammar.org Do/did is followed by an infinitive. Have is followed by a past participle. 어렵다. 단순 과거냐 완료시제냐는 문맥으로 판단하면 되지만, 역시 영어는 알면 알수록 어렵고 오묘하다. I did invite her, but she didn’t come. I don’t thin..