YOU SAID:

you opened this can of horses now lay in it

INTO JAPANESE

あなたはこの馬の缶を開けました今それの中に横たわっています

BACK INTO ENGLISH

You opened the can of this horse now lying in it

INTO JAPANESE

あなたは今その中に横たわっているこの馬の缶を開けました

BACK INTO ENGLISH

You have now opened the can of this horse lying in it

INTO JAPANESE

あなたは今、その中に横たわっているこの馬の缶を開けました

BACK INTO ENGLISH

You have now opened the can of this horse lying in it