Already is used to talk about something that has happened earlier than expected or earlier than it might/should have happened.
Don't forget you need to send an e-mail to Chris.
Thanks for reminding me but I’ve already sent it.
Still is used to refer to a situation that is continuing.
They've been together for fifty years and they are still madly in love.
As far as I know David is still working for the Daily Herald as a journalist.
Always is used to talk about an action that happens regularly.
I always go skiing in December.
She always walks to work whether it’s good or bad weather.
Yet is used to ask if something expected has happened.
Have you been to Latin America yet?
Has Sarah phoned you yet?
Yet is also used to say that something expected hasn't happened.
The clothes I bought on-line haven't arrived yet.
Peter hasn't yet arrived.
Lesson by Tristan, teacher at EC Malta English school
Now complete the following with 'already', 'still', 'always' or 'yet':