Asked about the prospect of MPs trying to stop the Article 50 process, Corbyn said: "I think Parliament may well want to do that but let's see what happens - but the crucial thing is Tuesday and if this Government can't control Parliament, it's time to move on to a general election so they people can decide who they want to be their government".
While Brexit Secretary Steve Barclay said there had been "some movement" from MPs to support the agreement which is widely expected to be defeated, he said he thought that if it fell the Commons would eventually support something "along the lines of this deal".
Writing in the Sunday Express ahead of a critical vote this week, May urged lawmakers to "do what is right for the country", because she said rejecting the will of the people would be "a catastrophic and unforgivable breach of trust in our democracy".
"Some of you put your trust in the political process for the first time in decades".
"So my message to Parliament this weekend is simple: It is time to forget the games and do what is right for our country".
May's deal agrees a 21-month transition period under current terms while the future relationship with the bloc is negotiated, but it has drawn steadfast opposition from both Brexiteers and Remainers.
"You, the British people, voted to leave", Mrs May wrote.
Her stark warning comes as Downing Street said it was "extremely concerned" about a cross-party group of MPs attempts to change Commons rules.
The Sunday Times reported that rebel lawmakers were planning to wrest control of the legislative agenda away from May next week with a view to suspending or delaying Brexit, citing a senior government source.
BBC political correspondent Chris Mason said one possibility was that backbenchers could legally compel the government to delay Brexit beyond the set departure date - a proposal some MPs have already called for. "Projectfear? Project terror? Extremism more likely if we get failed Brexit which leads to lower living standards and less money for services".
He said there would be a "different tone" in British politics if Britain failed to leave the European Union, and predicted a "less tolerant society" and a "more nationalistic nation".
In addition to recommending that MPs reject both a no-deal Brexit and the Prime Minister's deal, the letter states that the European Union should be asked to extend Article 50 beyond the current March 29 deadline, with a view to then supporting a new referendum on European Union membership.
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