http://www.esl-lounge.com/student/grammar/2g7-just-yet-already.php

http://eslzone1.tripod.com/grammarinter/_yet.htm

https://elt.oup.com/student/englishfile/preint/a_grammar/file04/grammar04_b01?cc=us&selLanguage=en

https://elt.oup.com/student/englishfile/preint/a_grammar/file04/grammar04_b02?cc=hu&selLanguage=hu

T-rex trying to do stuff:

http://trextrying.tumblr.com/