Have you ever been to England ?

[ph2004]

How to answer this question : "Have you ever been to England ?" "Yes, I've ever been to England." Or what ?

[sarat_106]

How to answer this question : "Have you ever been to England ?" "Yes, I've ever been to England." Or what ?

The question is about a completed action. If it has happened once, you can answer in simple past with a time expression or in the present perfect without time expressiom; as:
Yes, I went to England last year./I was in England last year.
Or
Yes, I have been to England once.