YOU SAID:
i am old now and i have grand kids
INTO JAPANESE
私は今歳で、孫がいます
BACK INTO ENGLISH
I am now and have grandchildren
INTO JAPANESE
私は今、孫がいます
BACK INTO ENGLISH
I now have a grandchild
INTO JAPANESE
私には今孫がいます
BACK INTO ENGLISH
I now have a grandchild
Come on, you can do better than that.