YOU SAID:
The napkins are dirty and my dog is muddy
INTO JAPANESE
ナプキンが汚れていて、犬が泥だらけ
BACK INTO ENGLISH
The napkin is dirty, the dog is muddy
INTO JAPANESE
ナプキンが汚れている、犬が泥だらけ
BACK INTO ENGLISH
The napkin is dirty, the dog is muddy
That didn't even make that much sense in English.