01-01-2012, 07:51 AM 
	
	
	
		The difference between "can't" and "couldn't":
I can't see anything right now
I couldn't see anything yesterday
It's the tense as in when you were unable to see. I hope this helps.
	
	
	
I can't see anything right now
I couldn't see anything yesterday
It's the tense as in when you were unable to see. I hope this helps.

 

 
