I'm an English teacher. I have a question about REPORTED SPEECH - PAST SIMPLE
In the book that we use there are two similar direct questions but the answers are different. I am confused, can you help me?
Ned: How old were you when you decided to become an astronaut?
Mr. Nash: I was 12 years old and I was in a physics class.
Ned asked Mr.Nash how old he was when he decided ...
Mr. Nash said he had been 12 and he had been in a physics class.
Why did we use past simple in the first one then past perfect in the second?