The 23-year-old has spent the majority of the current campaign on loan with Portuguese club Pacos de Ferreira, for whom he has scored 11 goals in 29 outings.
However, despite that form, it is expected that United will look to cash in on the former Portugal Under-21 international, who has 12 months left to run on his contract at Old Trafford.
That has resulted in speculation that Benfica are prepared to lodge a bid for his services, but Bebe has insisted that he is only focused on performing well for Pacos.
"The rumours about Benfica and other clubs do not affect me. I still have the desire to do my best for Pacos de Ferreira. At the end of the season I will talk to my agent and decide what is best for me," he told TV Sport.
Bebe has made seven appearances since he joined United in 2010, scoring two goals in the process.