(Thanks for the suggestion, @writingnation )
Affect: to infulence.
The sword fight that was to come affected Percy's mood.
Effect: a result
The effect of the challenge made Percy anxious to beat Jason in a sword fight.
Tricky? Yeah. Do I have trouble with this? Yes. Does Sky know the difference? Hades no! I still can't teach her.

YOU ARE READING
How To Write Correctly
RandomThis book was actually originally made by Annabeth for Percy when he told her that he was thinking about writing down his adventure to help demigods from all over the world know more about their life. Many of the people have been through a demigod...