YOU SAID:

The bed was on fire when I lay down on it

INTO JAPANESE

ベッドに横になったとき、ベッドは燃えていた

BACK INTO ENGLISH

When lying on the bed, the bed was burning

INTO JAPANESE

ベッドに横たわったとき、ベッドは燃えていた

BACK INTO ENGLISH

When I lay down on the bed, the bed was burning

INTO JAPANESE

私がベッドに横たわったとき、ベッドは燃えていた

BACK INTO ENGLISH

When I lay on the bed, the bed was burning

INTO JAPANESE

ベッドに横たわったとき、ベッドは燃えていた

BACK INTO ENGLISH

When I lay down on the bed, the bed was burning

INTO JAPANESE

私がベッドに横たわったとき、ベッドは燃えていた

BACK INTO ENGLISH

When I lay on the bed, the bed was burning