Question

      passe as frases a seguir para o passado continuo

   a) there are many students absent from the class now
   b) my parents go at the europe next week they stay there for one month

Answer 1

partindo do princípio de que as frases corretas seriam:
a) There are many students who are absent from the class
b) My parents go to Europe next week and they stay there for a month

então:

a) There are many students who were being absent from the class (não faz muito sentido, mas...)
b) My parents were going to Europe next week and they were staying there for a month (sigifica que estavam para ir e já não vão...)