Perfect Infinitive

Perfect infinitive paling sering ditemukan dalam kalimat type 3 conditional sebagai bagian dari conditional perfect meskipun juga dapat digunakan di tempat-tempat lain. Perfect infinitive dibentuk dari:
to have + past participle

Sama seperti present infinitive, ada situasi-situasi di mana bentuk zero dari perfect infinitive harus digunakan, sehingga kata to dihilangkan. Hal ini dilakukan setelah penggunaan sebagian besar modal auxiliary atau tempat lain yang menggunakan zero infinitive.

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Contoh
  • 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.
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