DURATION OF TIME


Expressing Duration of the Action: 
  
I have been doing something for time expression.: 
           
	'Hace' + (time expression)+ 'que' + (verb in present). 
		Hace tres semanas que yo estudio. (It's been 3 weeks that I have been studying.)

	(Verb in present) + 'desde hace'+ (time expression). 
		Yo estudio desde hace tres semanas. (I have been studying for 3 weeks.)



How long have you been doing something?:

	'Cunto tiempo hace que' + (verb in present) ?
		Cunto tiempo hace que estudias?  (How long have you been studying.)



I have been doing something for about time expression.:

	'Hace como' +(time expression)+ 'que'+ (verb in present). 
		Hace come tres semanas que yo estudio. (I have been studying about 3 weeks.)

	'Hace unos'+(time expression)+ 'que'+ (verb in present).
		Hace unos minutos que yo como.  (I have been eating a few minutes.)



Something happened time expression ago.:

	'Hace' +(time expression) +'que'+ (verb in preterit). 
		Hace diez minutos que yo com.  (It's been 10 minutes since I ate.)

	(Verb in preterit) +'hace'+(time expression).
		Yo com hace diez minutos.   (I ate 10 minutes ago.)