Sistema IE. Teaching and learning system of spanish as a foreign language. Libro para el estudiante. Exercises.
- Segunda Edición
- Quito- Ecuador Editorial Artes Gráficas 2006
- 358 páginas; Ilustraciones;
Basic Grammar. The alphabet. Gender and number. The article. The noun. The adjective. The basic phrase. The verb to be - SER/ ESTAR. Differences between SER and ESTAR. The sentence: types.