to have + 完了不定詞
- He pretended to have seen the film.
- Before I turn 40, I want to have written a book.
- I would like to have been to the Taj Mahal when I was in India.
- If I had known you were coming I would have baked a cake.
- Someone must have broken the window and climbed in.
- That man may have noticed the bank robbers' getaway car.