YOU SAID:

My friend really wants to run on a tredmil and I saw somone kill a bug

INTO JAPANESE

私の友人は本当にトレッドミルで走りたいと思っています、そして私は誰かが虫を殺すのを見ました

BACK INTO ENGLISH

My friend really wants to run on a treadmill, and I saw someone killing an insect

INTO JAPANESE

私の友人は本当にトレッドミルで走りたいと思っています、そして私は誰かが昆虫を殺しているのを見ました

BACK INTO ENGLISH

My friend really wants to run on a treadmill, and I saw someone killing an insect