Recent Events
Present Perfect
Present perfect for recent events:
The present perfect connects the past to the present moment. It is used to express an effect on the present moment. The time expressions 'just', 'yet' and 'already' are often used to express this relationship to the present moment in time.
Example:
This wiki has been updated twice.
Our wireless network hasn't been updated lately.
He's just debugged the program.
Already
Place 'already' directly before the past participle. 'Already' is used in positive sentences.
Subject + have + already + past participle + (object(s))
The virus has already corrupted the database.
Yet
Place 'yet' at the end of a negative sentence or question.
Subject + have + not + past participle + (object(s)) + yet
The sysadmin hasn't locked him out of the network yet.
Have + subject + past participle + (object(s)) + yet?
Have they set up a dedicated server for you yet?
Just
Place 'just' directly before the participle form to express that something has occurred recently. 'Just' is used in positive sentences.
Subject + have + just + past participle + (object(s))
He's just debugged the program.