I understand that should have/would have etc. are used to refer to something unrealistic or contrary to what has really happened. I do, however, have several questions.
I know that this form is most likely correct:
She should never have married him.
but is this also correct?
She should have never married him.
Second question, is this sentence correct?
She would have never married him, had it not been for her father.
Thank you in advance!