NARRATIVE TENSES

1. CONTRAST  BETWEEN SIMPLE PAST AND PAST PERFECT.

EXPLANATION
 http://www.englisch-hilfen.de/en/grammar/past_perfect_simple_past_contrasted.htm

EXERCISES  

http://www.english-4u.de/past_perfect_ex5.htm

https://www.ego4u.com/en/cram-up/grammar/simpas-pasper/tests?test1

https://www.ego4u.com/en/cram-up/grammar/simpas-pasper/tests?test2

http://www.englisch-hilfen.de/en/exercises/tenses/past_perfect_simple_past.htm


2. CONTRAST BETWEEN SIMPLE PAST PAST CONTINUOUS

EXPLANATION 

http://www.englisch-hilfen.de/en/grammar/simple_past_progressive_contrasted.htm 

EXERCISES

http://www.perfect-english-grammar.com/past-simple-past-continuous-exercise-1.html

http://www.englishpage.com/verbpage/verbs3.htm 

http://www.english-4u.de/past_prog_ex6.htm