The former Old Trafford assistant manager believes the Premier League champions' footballing ethics will see them stick by the Scot and allow him to make an impact
The Scot has struggled since replacing Sir Alex Ferguson during the summer, with last season's champions lying 15 points adrift of table-toppers Chelsea in seventh place.
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"The success of Manchester United was based on a couple of principles," he is quoted as saying by The Daily Mirror. "The first thing was it had a good foundation of consistency, continuity, trust and confidence.
"The other thing I learned when I was at the club: the club always had a strong belief with the people that work inside it - they trust themselves.
"I want to believe that it is just a tough time at the moment and in a short period of time we will see the Manchester United everyone expects.
"I have been in that experience and the most important feeling is to trust each other, believe each other, and make the right decisions. If you are not able to win today, I am sure tomorrow things will be right. I think they need to be given time."
Queiroz worked as Sir Alex's assistant in the 2002-03 season before returning for a four-year stint following a brief spell in charge of Real Madrid.
The former Portugal boss feels it was inevitable that Moyes would struggle in his first year, but has backed the 50-year-old to turn things around.
"I knew changing coach would not be easy," Queiroz added. "To cross this bridge after Sir Alex being with the team for so many years, in one way, I think we were always going to have to expect some difficult moments. It is natural.
"But I am very much confident. The club has a lot of experience; it is strong; it has a persistent culture. I am sure David Moyes in a short period in time will do the right things at the club and the team will start to perform."perform."