[Grammar] The right sentence for "How long ago?"

[infiniteone]

What is the right sentence for "How long ago?"
I know that makes sense in spoken language.
But, here are some conversations that make me confused :

1. Q: How long is it ago?
__A : It is 3 days ago.

2. Q: How long was it ago ?
__A: It was 3 days ago.

3. Q: How long has it been ago ?
__A : It has been days ago.

Are all these things are grammatically correct, in same meaning ?

 

[Barb_D]

What is the right sentence for "How long ago?"
I know that makes sense in spoken language.
But, here are some conversations that make me confused :

1. Q: How long is it ago?
__A : It is 3 days ago.

2. Q: How long was it ago ?
__A: It was 3 days ago.

3. Q: How long has it been ago ?
__A : It has been days ago.

Are all these things are grammatically correct, in same meaning ?

None of you questions are correct:
How long ago was it?
It was 3 days ago.

How long has it been since you saw him?
It has been 3 days.

When did this happen?
Three days ago.