Practice: For and Since

'2010' is a specific point in time, not a duration. Use SINCE. In Spanish it's 'desde 2010'.

'2 years' is a duration, not a point in time. Use FOR. In Spanish it's 'desde hace 2 años' or 'por 2 años'.

'They were teenagers' is a time reference, not a duration. Use SINCE. In Spanish it's 'desde que eran adolescentes'.

'A long time' is a duration, not a point in time. Use FOR. In Spanish it's 'desde hace mucho tiempo'.

'We were at school together' is a time reference, not a duration. Use SINCE. In Spanish it's 'desde que estábamos en la escuela juntos'.

'3 years' is a duration, not a point in time. Use FOR. In Spanish it's 'desde hace 3 años' or 'por 3 años'.

'2005' is a specific point in time, not a duration. Use SINCE. In Spanish it's 'desde 2005'.

'An hour' is a duration, not a point in time. Use FOR. In Spanish it's 'desde hace una hora' or 'por una hora'.

'5 years' is a duration, not a point in time. Use FOR. In Spanish it's 'desde hace 5 años' or 'por 5 años'.

'2018' is a specific point in time, not a duration. Use SINCE. In Spanish it's 'desde 2018'.

'They met at university' is a time reference, not a duration. Use SINCE. In Spanish it's 'desde que se conocieron en la universidad'.

'A long time' is a duration, not a point in time. Use FOR. In Spanish it's 'desde hace mucho tiempo'.