El Verbo to be es uno de los más utilizados y más variados del inglés.

[to be] = am/is/are, was/were, will = ser/estar.

Usos:

  1. Ser: he is the proffessor, that was cool.
  2. Estar: I was in class, they were fighting.
  3. Indicar edad: She is 20 years old.
  4. Hay: There is a reason.
  5. PodrĂ­a: there could be a reason.
  6. Tener: they were cold and hungry.