the grammar made me headache,who can help me ?
who can tell me the difference between
1. I haven't seen you for a long time ,where have you been ?
and
2. I didn't see you for a long time, Where did you go ?
and
3. I haven't seen you for a long time . Where did you go ?

Which is right ? and what's the difference?

Question

the grammar made me headache,who can help me ?
who can tell me the difference between 
1. I haven't seen you for a long time ,where have you been ?
and 
2. I didn't see you for a long time, Where did you go ?
and 
3. I haven't seen you for a long time . Where did you go ?


Which is right ? and what's the difference?

Answer

The grammar gave me a headache, not made me a headache.  Also all three sentences mean the same thing and you can use any one of them.

Evden çıkmadan dil öğrenme fırsatını kaçırmayın. Deneyimli dil eğitmenlerimizden oluşan seçkimize göz atın ve ilk dersinize şimdi kaydolun!