The phrase "may become unable" is grammatically correct and can be used in written English.
It is typically used to express the possibility of someone or something losing their ability to do something in the future. Example: If he doesn't start taking better care of himself, he may become unable to walk in a few years.
Cytotoxic T lymphocytes continuously exposed to viral or tumor antigens, with long-term expansion, may become unable to proliferate ("exhausted").
The government has made the growing resistance to antibiotics a key priority and Prof Dame Sally Davies, the chief medical officer, has warned that doctors may become unable to perform certain operations if the tide is not turned.
Finally, the Bank of Japan's decision to raise interest rates has meant that banks will probably have to sell shares to cover losses from borrowers, who may become unable to bear the burden of higher interest payments as well as to meet increased interest bills to depositors.
Existing homeowners may become unable to afford escalating property taxes, often leading them to sell and take advantage of increases in the values of their homes.
Although these values are important to protect, they also risk slowing down diplomacy to such an extent that it can harm its effectiveness, as diplomats may become unable to timely respond to the challenges at hand.
"None of us knows when or under what circumstances we may become unable to make decisions about the health care we want to receive and as importantly the care we do not want," said Ruth Linden, Founder and President of Tree of Life Health Advocates in San Francisco.
In the presence of coupling delays a network of PCOs may become unstable, and the network is unable to synchronize [13].
And with the rocky future the Affordable Care Act has, given recent moves by the House and Senate, there are a lot of people who may be in trouble and become unable to afford insurance.
But another theory holds that when a new geographical barrier splits a population into two, they may accumulate genetic differences and eventually become unable to interbreed.
Polar bears injured in fights or accidents may either die from their injuries or become unable to hunt effectively, leading to starvation.
For example, an individual with HD may be able to begin folding laundry but quickly become unable to focus on the task at hand due to distractions.
