Earlier, Mr Shorten was at a manufacturing workshop in Melbourne and criticised the Prime Minister's decision to forge ahead with the TPP given it was "dead in the water".
"Why on earth Mr Turnbull wants to tee off his year on a trade or treaty with Donald Trump who said he won't sign it is beyond me," he said. "It is a waste of time."
The Business Council of Australia backed Mr Turnbull, while the Australian Council of Trade Unions reaffirmed its strident opposition to the TPP.
Mr Shorten sidestepped questions about how Labor would vote if TPP legislation came to the Parliament.
"Mr Turnbull should be focusing on matters closer to home," he said.
"Standing up for Australian jobs, encouraging more Australian apprenticeships, getting behind the metal manufacturing sector, making sure there is a plan to pick up all the dislocated and displaced car workers who are losing their jobs at Holden this year."
The Greens confirmed they would vote against the TPP.
"It's a disastrous deal that would only help major corporations and it should never have progressed as far as it did," the party's trade spokesman, Sarah Hanson-Young, said.
"Malcolm Turnbull is delusional and wasting his time if he thinks he can revive this dodgy agreement. It would drive up costs for things like cancer medication, and leave regular Australians worse off."
The ACTU warned the "deeply flawed agreement" could cost up to 40,000 Australian jobs.
"Prime Minister Turnbull is finding new and innovative ways to be out of touch – this time moving to ratify a trade agreement which would place the interests of corporations ahead of Australian workers and could see huge numbers of local workers lose their jobs, their livelihoods and for younger workers a decent future," ACTU president Ged Kearney said in a statement.
"Instead of working on a plan to put an end to rising underemployment and casualisation, or improving wage growth, or even simply trying to prevent Australia slipping into recession, the Turnbull Government is ratifying dead trade agreements."