YOU SAID:
John laughed at my doll
INTO JAPANESE
ジョンは私の人形を見て笑った
BACK INTO ENGLISH
John looked at my doll and laughed.
INTO JAPANESE
ジョンは私の人形を見て笑いました。
BACK INTO ENGLISH
John looked at my doll and laughed.
That didn't even make that much sense in English.