The phrase "are unable to shift" is correct and usable in written English.
It can be used when describing a situation where someone or something cannot change position, perspective, or state.
Example: "Due to the heavy traffic, we are unable to shift our schedule for the day."
Alternatives: "cannot move" or "are not able to change".
Species and populations that are unable to shift their geographic distributions or have narrow environmental tolerances are at an increased risk of extinction.
They must also quit if they are unable to shift their mind-sets from the money-grabbing culture of the past to the more service-orientated culture of the future or cannot apologize sincerely for the excesses of the past.
But horses, like humans, are unable to shift their weight off all four legs; they compensate for the additional force by keeping their feet on the ground longer.
Driving prices too low could also create disincentives for manufacturers to enter or remain in the market, especially smaller manufacturers who are unable to shift costs across multiple product lines.
By 2009 the company found they were unable to shift their huge orders of stock, and came close to bankruptcy.
Companies in competition with others located where rates are lower may be unable to shift the tax fully to consumers.
For starters, Deutsche Bank may be unable to shift enough capital to the United States to support its Taunus subsidiary.
Unlike with previous revisions of millennial dates, chronographers were unable to shift the chronology without mentioning the apocalyptic date.
Vulnerable birds will be unable to shift their breeding seasons as the climate warms, according to a study carried out by Scottish scientists.
Milan was unable to shift Christian Abbiati on to Palermo, and Lloris opted to remain with Lyon, where he was guaranteed to start every game.
Here are a few recent examples: CHRYSLER Some 2007 Chrysler 300s, Dodge Magnums and Dodge Chargers may be unable to shift out of Park.
