A typical present perfect clause thus consists of the subject, the auxiliary have/has,
and the past participle (third form) of the main verb. Examples:
- I have eaten some food.
- You have gone to school.
- He has already arrived in Catalonia.
- He has had child after child... ( The Mask of Anarchy , Percy Shelley)
- Lovely tales that we have heard or read... ( Endymion (poem) , John Keats)
Early Modern English used both to have and to be as perfect auxiliaries.
Examples of the second can be found in older texts:
- Madam, the Lady Valeria is come to visit you. (The Tragedy of Coriolanus , Shakespeare)
- Vext the dim sea: I am become a name... ( Ulysses , Tennyson)
- Pillars are fallen at thy feet... (Marius amid the Ruins of Carthage, Lydia Maria Child)
- I am come in sorrow. (Lord Jim, Conrad)
