A person goes to the doctor with his 5 year son
.Person: Doctor, my son has swallowed a key, so we came to you
?Doctor: When did he swallowed a key
.Person: 10 days back
?Doctor: And you are coming to me now, after 10 days. why
.Person: We had a duplicate key, but today it is lost
H.W
if you understand the orange words form the conversation use them to make new sentences