Question

I ____ never seen such a picture before.

Answer 1

I had never seen such a picture before

Answer 2

I have never seen such a picture before.

Detailed answer

Have is the most appropriate word to be used at a particular moment.

• The sentence is now a grammatically appropriate sentence that is meaningful.
• The word never is used to show the meaning, not at all or we use never in a sentence to mean not at all.
• The sentence now conveys that the person has never seen such a picture before.