Ronaldo, 23, has been a constant threat to opposing defenders throughout the campaign, be it in the Premier League, Champions League and FA Cup.
He has already eclipsed last season’s total of 23 goals and proved he is an exceptional attacking force, either out wide or occasionally up front.
He scored a brace in the 5-1 victory against Newcastle last weekend to take his tally to 29.
Now Ronaldo (right) faces Fulham today at Craven Cottage - a ground that holds special memories for him as he scored a late winner in that corner of London last season.
Ferguson said, "Cristiano has played as a centre forward a couple of times and scored four goals in two games.
"That is a great strike rate, but to score those goals as a wide player is phenomenal.
"It is a superb achievement and he has cast any doubts aside about whether he could repeat last season’s total.
"Ronaldo's performance that day against Fulham was absolutely superb and he changed the face of the game."
That 2-1 victory, almost a year ago to the day, proved to be vital, as Ferguson admitted, as they went on to hold off Chelsea’s challenge and regain the title.
"The winner came so late in the game, it was a plus point and a crucial victory, " he said.
"We were a few points ahead of Chelsea, but, as you would expect, they were plodding on behind us. You knew if you made a mistake it would count."
However, it is United who are now in the slipstream and out to peg back Arsenal’s three-point lead at the top of the table with Chelsea still in the frame.
Ferguson believes he has the squad to cope with a hectic schedule of league, Champions League and FA Cup games.
He said, "It is not easy but we have the experience and hopefully the strength of our squad this season will mean something and help us."