Question

Как сделать предложение в пассивным залоге: He never pays attention to Pam

Answer 1

Pam is never paid his attention.

Answer 2

No attention is (ever) paid to Pam.
or
Pam is never paid any attention.
(This phrase is also acceptable, but the first variant reads much better than the second one.)
However, you need to leave out "to" in both cases.