YOU SAID:

i am goin to commit murder

INTO JAPANESE

私は殺人をするつもりです

BACK INTO ENGLISH

I intend to commit murder.

INTO JAPANESE

私は殺人を犯すつもりです。

BACK INTO ENGLISH

I'm going to commit murder.

INTO JAPANESE

殺人を犯すつもりだ

BACK INTO ENGLISH

I'm going to commit murder.