he said to me:"you had better hand in your paper at once."怎样变成间接引语?

he said to me:"you had better hand in your paper at once."怎样变成间接引语?
The teacher said to me , “Don’t look outside in class.”怎样变间接引语？
Tom said : “Let’s go out for a walk after the dinner.”怎样变间接引语？
Mike asked : “Will Jack arrive tomorrow?”怎样变间接引语？
He asked me : “Have you ever been abroad?”怎样变间接引语？
His brother asked him: “ why didn’t you write to me?”怎样变间接引语？