I've been so gruff these day.  
요즘 너무 무뚝뚝했어.


I've been so lucky these day.
요즘 정말 운이 좋았어.


I've been so tied up these days.
요즘 너무 바빴어.


I've been so upbeat these days.
요즘 정말 부푼 기분이었어.


I've been so worn out thesd days.
요즘 너무 지쳤어.



  2) Role Play

A : How come you're so down in the mouth?

왜 그렇게 우울해?

B : I've been so worn out these days.

요새 너무 지쳤었어.

A : You need a breather.

좀 쉬어야 겠네.