Question

has jameel killed a snake? change into passive voice​

Answer 1

Had a snake been killed by Jameel?

Answer 2

Answer:

If I were not wrong,

Shall have killed —is a part of the perfect future tense that requires to have first event before another event. — uncertainly, this can’t be used on killing snake, unless the subject question will be rephrased again to show its relation to dual events in series.

Should have killed — is is an integral part of the past perfect form on conditional sentence.

The context is presumably like this…

*(If we had come earlier,) we should have killed the snake.