PRESENT PERFECT SIMPLE
- is used to talk about an action that started in the past and continuous in the present
Laura has played tennis for five years.
John and Lizzy have been married since 2002.
- is used to refer to a past action when we don’t know the exact time
My bike has been stolen.
- is used to ask about past experiences with ever
Have you ever driven a Ferrari?
- Ever with a superlative adjective is also used to emphasise how bad or good something is
It is the most boring film I have ever watched.
- is used to talk about very recent events:
I have just arrived.
- is used to talk about completed actions.
Mary has already done her homework.
- Is used to describe actions that aren’t completed or done
I haven’t bought the book yet