I can't do it
俺には無理だ。
I can't do it.
俺には無理だわ
— 映画 聲の形 (2016)
俺には無理だから
Because I can't do it.
一週間でこんな分厚い本を読むなんて俺には無理だ。
There’s no way I could read such a thick book in a week.