Present Perfect

	Statement	Negative	Question
I She/he/it We/you/they	have worked... has worked... have worked...	haven't worked... hasn’t worked... haven’t worked...	Have I worked...? Has she worked...? Have you worked...?
I’ve worked here since 2001. I haven’t been to China. Has he arrived yet?
1. To link past and present: I have lived in London since I was a student. (I still live there) 2. When the result of a past action is still evident. What have you done to your hair?
The following expressions also have the function of linking the past with the present: already, since then, so far, up to now
Just	I’ve just had dinner.
Yet	Has your sister arrived yet? (question) I haven’t had breakfast yet. (negative)
Already	I’ve already seen that film. (statement)
Since	We have been friends since we were children.
For	They have known eacht other for a long time.
Have you ever...?	Have you ever been to Australia?
Never Been Gone	My mom has never travelled by plane. He has been to college. (ele voltou e terminou) He has gone to college. (ele ainda está lá)