YOU SAID:
Today has been exhausting
INTO JAPANESE
今日は疲れきっています
BACK INTO ENGLISH
I'm exhausted today
INTO JAPANESE
今日は疲れました
BACK INTO ENGLISH
I am tired today
INTO JAPANESE
今日は疲れてる
BACK INTO ENGLISH
I'm tired today
INTO JAPANESE
今日は疲れた
BACK INTO ENGLISH
I'm tired today
Well done, yes, well done!