Showing cause and result
        They had to put off the exam because the teacher was ill.
        There was an awful traffic jam because it was snowing.
  - Since, as (Como, puesto que)
Since/As the teacher was ill, they had to put off the exam.
  - Due to/ Because of/ Owing to (debido a, a causa de)
(Followed by a noun)
        There was an awful traffic jam because of the snow.
        He couldn´t go on holiday last summer due to his brother´s illness.
        The company is expanding so they will need staff.
  - Therefore/ Consequently (asi pues, como consecuencia)
The company is expanding abroad, therefore/consequently he will have to travel quite often.
  - As a result (como resultado)
As a result of his excellent marks, he has been given a prize.