Here are some examples:
* "The team was unproductive after the holiday break."
* "The new policy is likely to make the company unproductive."
* "They have become unproductive because of the lack of resources."
You can also use the verb "produce" in a negative way to express the same idea:
* "The company is not producing enough."
* "They failed to produce any results."
It's important to note that "unproductive" is an adjective, not a verb. It describes a state of being, but it doesn't express an action.