Examples :

• Subjunctive (British Council)
  
  

• Subjunctive - a mini-tutorial (englishpage.com)
  - with An Interactive Exercise

• Subjunctive - examples :
  - Common expressions
  - Specific examples in different media
  (ceafinney)

INTERACTIVE exercises :

• Uses of the Subjunctive
  - "After each sentence, select the verb or verb string that best completes that sentence."
  (grammar.ccc.commnet.edu)

• Subjunctive - a mini-tutorial (englishpage.com)
  - with An Interactive Exercise

Songs :

• If I Were A Bell by Ella Fitzgerald
  "...if I were a bell I'd be ringing!"
  (hotlyrics.net)
  - the VIDEO :
  Marlon Brando & Jean Simmons - Jean Simmons singing 'If I Were A Bell' from the musical Guys & Dolls
  (YouTube)