The phrase "have always cooperated" is grammatically correct and can be used in written English.
It is the present perfect tense of the verb "cooperate" and indicates that the action of cooperation has been ongoing and consistent in the past leading up to the present moment. Example: "The two companies have always cooperated on various projects and have maintained a strong partnership over the years."
He had been robbed in his taxi before and had always cooperated with the robbers.
Mr. Arinc strongly denied initial reports that his government had refused the Israeli offer, saying that the two countries had always cooperated at times of natural disaster.
"The safety, welfare and support of our customers is, and always has been, our highest priority," the company said in a statement, adding it had always cooperated with the ACCC and would continue to do so.
Katy Delaney, a Battelle spokeswoman, would not comment on the laboratory's anthrax work except to say that the lab had always cooperated "with any and all legitimate inquiries from law enforcement".
At the time, the foreign ministry spokeswoman, Maria Zakharova, said: "Russia stood at the origins of the ICC's founding, voted for its establishment and has always cooperated with the agency.
Enron said in a prepared statement today that it had always cooperated with its auditors and that it had been the Enron management, not Andersen's, that "discovered the arrangement" that raised questions about the accounting treatment of one special-purpose entity.
Enron said in a statement today that it had always cooperated with its auditors and that it had been Enron's management not Andersen's that "discovered the arrangement" that raised questions about the accounting treatment of one special-purpose entity.
On Saturday, the company said it "has always cooperated with the authorities and will also continue to vigorously defend its people".
Both girls contacted the police and DA shortly after the incident and have always agreed to cooperate fully with the investigation".
