Present Perfect

An action that started in the past and goes on up to present time.

An action that happened in the past, but time is not mentioned.

An action that happened many times in the past.

FOR  (por)  - I´ve worked here for 5 years.

SINCE (desde) - I´ve worked her since 2015.

EVER (já - any time in your life) - Have you ever tried Mexican food?

ALREADY (já - specific time) Have your already finished your test?  I have already seen this film.

YET (ainda) - I haven´t done my homework yet. 

STILL (ainda) - I still haven´t done my homework.

NEVER (nunca) - I´ve never flown in a hot air balloon.