"start cooperating with" is a correct and usable phrase in written English.
It means to begin working together or collaborating with someone or a group of people. Example: After several months of tense negotiations, the two companies finally agreed to start cooperating with each other to develop a new product.
In a statement, Elisabeth Massi Fritz said Mr Assange should "pack his bags, leave the embassy and start cooperating with the police and the prosecutor".
The story of Mitchell's fall illustrates how conspirators in a political coverup turn on one another when former colleagues start cooperating with prosecutors.
"But if we start cooperating with the U.N. we'll be forced to learn Albanian because these people refuse to recognize our culture and our history here that we've fought to defend".
The Cone et al. model is qualitative and descriptive, providing a practical, step-by-step way for companies to pick and start cooperating with an NGO.
The Six and UN can only cooperate with North Korea and remove sanctions if they renounce the nuclear program, as Iran has done, and start cooperating with West in different areas.
In front of a gang of journalists, assembled to witness what was supposed to be a historic moment the first tangible sign that Kosovo's Serb-majority municipalities were ready to start cooperating with the rest of the country Pantic was struck by the realization that, by taking the oath, he would be acknowledging Kosovo's legitimacy as a republic.
He described Abu Zubaydah as having started cooperating with investigators within seconds of being waterboarded.
Prosecutors initially said Ms. Khan started cooperating with the government in November 2007.
After he started cooperating with authorities, Louis was reading about these dot-com criminals and these analysts who were lying to people.
Since she pleaded guilty and started cooperating with the government, Butina was interviewed once by prosecutors with special counsel Robert S. Mueller III's office, a debriefing that lasted about an hour, according to a person familiar with the interview.
Marketwatch also started cooperating with the SEC in its request for documents and files.
