YOU SAID:

i slamed my pen in the car door

INTO JAPANESE

車のドアにペンを叩きつけた

BACK INTO ENGLISH

I slammed a pen on the car door

INTO JAPANESE

車のドアにペンをたたきました

BACK INTO ENGLISH

I hit the pen on the car door

INTO JAPANESE

車のドアにペンをぶつけた

BACK INTO ENGLISH

I hit a pen on the car door

INTO JAPANESE

車のドアにペンをぶつけた

BACK INTO ENGLISH

I hit a pen on the car door