Grammar: past continuous vs. past simple, must/should and have to

• Past continuous: 
  Explanation about the past continous in Dutch, with an exercise.
  Explanation in English with several exercises at the bottom of the page.
  
  Exercise 1

          A YouTube clip with some example sentences:  . Try doing this exercise yourself :-)
 

• Must, should and have to:
  a YouTube clip which explains the difference between 'must' and 'should'. 
  Explanation in English about 'must' and 'have to', including some exercises.
  Page with links to grammar quizzes about this topic.