to get an agreement with Brexit that was adopted in time for the UK to leave the EU on March 29.
The prime minister told the MPs that he would raise a requirement for a 21
It opens the possibility that he will delay the final voting of Brexit until the days before the UK must leave the EU.
No 10 insists that Mrs. May will hold a vote in her deal soon.
But Jeremy Corbyn accused him of "running down the clock" in an effort to "blackmail" MPs in backing up his dealings.
Britain is currently leaving the EU on March 29, with or without deals.
motion for debate on Thursday, seeking continued support of the House for the prime minister to demand an "alternative arrangement" on the controversial backstop of Ireland.
The backstop is a promise to prevent checks on goods and people returning to the Northern Ireland border in the event of no dealings.
And Mrs May promised to return to the Commons on February 26 with an additional statement – which will trigger another debate and vote the next day – if a deal is unsecured on that date.
If a deal is agreed, the MPs will have a second "significant vote", more than a month after Mrs May's deal was denied to the first one.
The PM said he was discussing a number of EU options to secure legitimate existing backstop changes: It was replaced by "alternative adjustments", putting a time limit for how long it may remain in place or a unilateral exit clause so that the UK may leave it at one time of its choice.
Votes of February 27 are expected to arrive soon after Mrs.'s consulted interview. In the European Commission President Jean-Claude Juncker.
The former law attorney general Dominic Grieve warned that the time runs for the ratification of a deal under the Constitutional Reform and Law Governing Law.
But Mrs. May replied: "In most situations, that time may be important so that this House has the opportunity to study that agreement.
" But of course, "So while we will follow the normal procedure if we can, without the remaining time following a successful vote, we will make the provisions of the Agreement Falling Bill – with Parliament's consent – to ensure that we can ratify on time to ensure our release in an orderly manner. "
But Labor's claim Mrs May tries to postpone the final and binding vote in the recovery agreement that she agrees to the EU until the last possible time, so MPs face a choice between him
The party has given an amendment for Thursday to force the government to return to Parliament at the end of the month to have a significant vote in the Commons on its plan for Brexit.
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Mr. Corbyn said: "The prime minister is playing time and playing in the jobs of people, our economic security and the future of our industry.
"clear deadline for the government to reach its revised deal or give MPs the opportunity to decide what will happen next. "
Was May delay Brexit vote at the last minute?
As we talked about late on Monday, there was an understanding of Westminster that the prime minister was, perhaps in the accident, probably growing through designs, are looking at the last possible minutes for a specific vote of Brexit.
While ministers speak to the public of "conversations" that must be given to the EU, and officials will continue to chew with the possibility of "Malthouse compromise" (note that it looks like the months that have passed, blinking, in the Brexit saga) more MPs believe it is a removal activity – mini sters that keep outside busy as they run down the clock. Early on Tuesday morning, the head of the Commons Andrea Leadsom does not exactly turn that credibility into an interview with the program Today.
She appeared to be open the possibility that MPs may be asked to vote at a moment of the danger of peak, and ministers may be willing to let things run for a while.
Then on Tuesday afternoon, the prime minister himself indicated that the government was ready to do so.
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A group of cross-party parishes who say that if they have no deal with 26 February, they will try to force the government to reach a decision on Brexit, and if UK has left without a deal, by mid-March.
The group – including Labor MP Yvette Cooper and conservative former ministers Sir Oliver Letwin and Nicholas Boles – will say they will lower a change that creates a parliamentary period for a bill that implements a deadline for the prime minister and Parliament. "This bill creates a parliamentary safeguard to prevent the accidental accidental drift, and to avoid important decisions left over during the last two weeks," Ms Cooper says.
Sir Oliver said: "Any MP who really wants to stop an unreasonable non-deal that Brexit needs to vote for this bill by the end of February." This is the only way of giving of the House of Commons of the time to come up with an agreement about a positive way if PM can not get his deal through mid-March. "
A similar amendment set a deadline deal of February 26 and suggested the possibility of expanding Article 50 was tabled by Ms. Cooper and narrowly fallen into the Commons in January