Grieve is one to watch
The Grieve amendment basically takes power away from the government and lets the backbenches set the agenda. The government is irritated that the Speaker is even allowing a vote on it.
If the Cooper and Brady votes fail, as expected, this could be the one that has some lasting impact.
Grieve proposes that on six Tuesdays between now and March 29, backbench MPs' motions would take priority over government business, so that the Commons can vote on those alternatives.
Grieve is a Conservative backbencher and Labour is said to back it so there is some wide support. May will surely try to spike it but it will be close.
Here are more details on the various amendments. Labour is also expected to support the Spelman amendment that would say the UK won't leave the EU without a deal. This one could pass because it's only advisory. The Reeves deal will also be supported by Labour and calls for a two-year extension to Article 50 if there's no deal by Feb 26. It's likely to fail.