Have I changed the direct speech into indirect correctly?
He said,"If I had a pen,I could write the answer."
He said if he had had a pen,he could have written the answer."
The part that says "he could have written the answer" implies an impossible case however "could write" is improbable not impossible, so we have changed an improbable case into in an impossible and it doesn't make sense to me! However, I'm not that sure,could you help please. Thanks.