I ____________________ teacher for fifteen years.
has been
have been
have be
Past participle of "begin"
begun
began
begin
_______ he ______________ all the letter?
Has / type
Have/typed
Has/typed
The accountants ____________________ for prepared the balance
have met
have meet
has meet
Past participle of "file"
file
filed
filing
She ____________________ the formal clothing
has worn
hasn´t worn
Has/worn
Has the account worked in the bills?
No, he has not.
Yes, he has.
No, They has not
Perfect tense gives the idea that something happens or is happening before something else.
The past present participle is formed by adding "ed" to the verb.
The ending of the past participle is "ando, endo, iendo"