Past simple vs Past Continuous: I was running when it started to rain!

You are finding it hard to understand when to use each one of them so I'm giving you a couple of links for you to keep on practising:

Some theory first. (In Spanish)

Exercise 1

Exercise 2

Exercise 3

Exercise 4

Exercise 5

Exercise 6

Exercise 7

Exercise 8

Exercise 9

Exercise 10

Exercise 11

You don't need to do all the exercises. Just keep practising until you are getting at least 90% right! 

Happy practising! :)