"The fans have every right to boo. That performance is not good enough for Newcastle," Pardew conceded to the media after the game.
"The first goal knocked our confidence. Liverpool looked faster, sharper, better organised than us all day today. We lacked a bit of experience. We got ragged after the third goal - that's not like one of my teams.
"I'm deeply disappointed in terms of the displays we had out there today. Liverpool looked that much better than us and that shouldn't be the case.
"The most important thing is that the team has the experience on the pitch to show that. Maybe we were missing that today."
Mathieu Debuchy capped a miserable evening for Newcastle when he was sent off with 15 minutes remaining but Pardew refused to single out any of his players for criticism following the heavy defeat.
|12/1||Newcastle are 12/1 with BetVictor to be relegated from the Premier League
"I expect to see all my team out there on Monday morning whether their foot is hanging off, ready to train."
Newcastle face away trips to West Ham and QPR before hosting Arsenal on the final day of the season. Pardew feels that his side's fixtures away from home are vital and believes that the imminent return of captain Fabricio Coloccini will be a welcome boost for his defence.
"We need to take something out of our two away games," he warned. "Coloccini's leadership and guidance will be important to us and hopefully he comes through this week. We've got two or three in that dressing room that have been relegated at this football club, so they know what it is about.
"Sometimes we can get dragged down in a spiral of negativity and I think that's what happened today. We need to roll our sleeves up and make sure we make a real good fist of these last three games."