MANILA, FEB. 25 -- President Corazon Aquino, who came to office two years ago as a social reformer committed to ending human rights abuses by the military and reversing longstanding social inequities, has gradually moved across the political spectrum to become more promilitary, pro-big business and ardently anticommunist, according to her own public statements and political analysts.

As Filipinos this week began celebrations for the second anniversary of the "People Power" revolution that drove Ferdinand Marcos from power, many of Aquino's once staunch supporters are asking whether the ideals of the revolution have been betrayed.

"There are those who ask whether her sacred regard for human rights as manifested during the {1985 presidential} campaign is still with her," said the Rev. Joaquin Bernas, president of Ateneo University and a former close adviser to the president. "There is a growing perception that she is becoming a captive of the military mind. As far as social justice is concerned, she has not shown herself as pursuing this goal with vigor."

Many say Aquino's transformation was, in part, a requisite for her continued survival in office. Others say Aquino's new, conservative tone fits her more naturally, given her origins as a member of the landed gentry.

"Her courting of the military, her courting of business, even her courting of former Marcos loyalists are a recognition of the social realities in the Philippines," said the Rev. John Carroll, who directs the Institute on Church and Social Issues, a Jesuit research organization.

What is certain is that Aquino's ideological evolution has, for the moment, solidified her hold on power by defusing military tensions and coopting the criticism of the conservative business community.

But her shift to the ideological right has dismayed many of her initial core supporters. These human rights advocates and leaders of the powerful Roman Catholic church say they feel increasingly estranged from the government they helped install.

In a recent front-page article, a widely respected local columnist and Aquino supporter, Amando Doronila, took an unusually critical view of the government. "It is compelling to call attention to the growing convergence of political tendencies of the Aquino government and of the Marcos regime policies," he wrote.

Referring to "a sense of betrayal" felt by the participants in the 1986 revolution, he wrote: "They see the reincarnation of the Marcos regime disguised in the clothes of the new democracy."

Her highly touted "comprehensive" land reform program aimed at dismantling the country's huge agricultural estates and defusing the rural appeal of the communist insurgency has bogged down in Congress.

A powerful landowners' lobby has succeeded in watering down key provisions. As the debate drags on, expectations here are fading that whatever emerges under the Aquino government will be anything like the proposal initially promised.

"Land reform has turned out to be the supreme embarrassment of the government," said Blas Ople, a moderate opposition politician.

Government officials defend her hands-off approach to the land reform debate, arguing that in a newly reestablished democracy, it is healthier to have controversial issues hashed out in an elected congress rather than through presidential decree. "We are sitting back and letting Congress do its own thing," said Philip Juico, agrarian reform secretary.

But as one western diplomat pointed out, "Land reform could have a very, very important psychological effect on the population. It could be a take-off point for the economy, and it's important for social justice." But, he continued, "if she had been committed to land reform, she would not have left the key decisions to a Congress that everyone knows is tied up in vested interests."

Her stance on human rights also has come under attack. Last month, while swearing in a new armed forces commander-in-chief, Aquino told assembled troops: "The critics of our military policy on the left have attacked our vigilance over the people's right to live in peace and safety as a harbinger of unrestrained warfare, in which the greatest casualties will be innocent civilians. All accusations of a deliberate disregard for human rights have been shown up to be total lies."

Sen. Rene Saguisag, a human rights lawyer, was once one of Aquino's closest advisers. Saguisag said he was personally upset over Aquino's remark that accusations of military human rights abuses are "total lies."

"Even Marcos never denied human rights abuses were taking place," he said.

These changes in her position have the potential to diminish Aquino's highly favorable international standing, according to some diplomats. "It's quite clear that she's abating her responsibility in terms of protection of human rights," said one well-informed western diplomat. "She's more interested in making sure the military is solidly on her side."

Several international and Filipino human rights groups, including the Hong Kong-based Asian Human Rights Commission and the Filipino group Task Force Detainees, have, over the last few weeks, documented continuing cases of intimidation, torture, forced evacuations and cases of "disappearances" in the countryside by the military or by military-supported right-wing anti-communist vigilante groups. Task Force Detainees is believed to have links to the communist underground, but the group's reports have generally been considered reliable here.