YOU SAID:

Im in school which is so boring

INTO JAPANESE

私はとても退屈な学校にいます

BACK INTO ENGLISH

i am in a very boring school

INTO JAPANESE

私はとても退屈な学校に通っています

BACK INTO ENGLISH

i go to a very boring school

INTO JAPANESE

私はとても退屈な学校に通っています

BACK INTO ENGLISH

i go to a very boring school