YOU SAID:

I find it very annoying when my flat mate whistles on the corridor in this very happy manner.

INTO JAPANESE

私の同居人が廊下でこのようにとても幸せそうに口笛を吹くのをとてもうっとうしく思います。

BACK INTO ENGLISH

It annoys me so much to see my roommate whistling so happily in the hallway like this.

INTO JAPANESE

ルームメイトが廊下で楽しそうに口笛を吹いているのを見ると、とてもイライラします。

BACK INTO ENGLISH

Seeing my roommate happily whistling in the hallway is very frustrating.

INTO JAPANESE

ルームメイトが廊下で嬉しそうに口笛を吹いているのを見ると、とてももどかしいです。

BACK INTO ENGLISH

It's so frustrating to see my roommate whistling happily in the hallway.

INTO JAPANESE

ルームメイトが廊下で嬉しそうに口笛を吹いているのを見るのはとてももどかしい。

BACK INTO ENGLISH

It's so frustrating to see my roommate whistling happily in the hallway.