12. https://www.english-area.com/paginas/pasadosimple.pdf
-examples in the past simple
http://www.universidadlaboraldemalaga.es/datos/Ingles/Past_Simple.pdf
-exercises in the past simple
https://www.google.com.pe/search?q=joven&source=lnms&tbm=isch&sa
=X&ved=0ahUKEwi82aat4YHTAhUH2yYKHUOUDwEQ_AUIBigB&biw=768&
bih=473#tbm=isch&q=was+and+were&*&imgrc=05w9WAzT6pUJgM:
-examples of was and were
http://learnenglishteens.britishcouncil.org/grammar-
vocabulary/grammar-videos/past-simple-regular-verbs
-video about of the past simple