Question

I saw her burning all the documents

Answer 1

Answer:

The burning of books represents an element of censorship and usually proceeds from a cultural, religious, or political opposition to the materials in question. In some cases, the destroyed works are irreplaceable and their burning constitutes a severe loss to cultural heritage.

Answer 2

Answer:

Explanation:

I saw her burning all the documents.

She was seen burning all the documents by me.

Most probably the passive form is required in the question.