The document provides examples of words ending in "-ed" and "-ing" and discusses when to use each. Some key points covered:
- Words ending in "-ing" are used to describe a situation, person, or thing (e.g. "an interesting teacher").
- Words ending in "-ed" are used to describe how a person feels (e.g. "I'm very interested").
- In Spanish, "-ing" words translate to forms with "es/son" and "-ed" words translate to forms with "está/están".
The document concludes by recommending exercise websites to practice these rules.