YOU SAID:

killing people is hard to do in the day time

INTO JAPANESE

人を殺すことは日中行うのが難しい

BACK INTO ENGLISH

Killing people is hard to do during the day

INTO JAPANESE

日中は人を殺すことは難しい

BACK INTO ENGLISH

It is difficult to kill people during the day

INTO JAPANESE

日中に人を殺すのは難しい

BACK INTO ENGLISH

It is difficult to kill people during the day