The phrase "a negative turn" is correct and usable in written English.
It can be used to describe a situation or event that has taken a downturn or has become unfavorable.
Example: "The project was initially promising, but it took a negative turn when funding was cut."
Alternatives: "a downward shift" or "a detrimental change".
Once he left for other world capitals matters took a negative turn at Rabat.
It could take a negative turn at any point," says Napravnik, referring to an article about her due to be published in a major New York magazine.
"But as it started to take a negative turn over the last several months, they felt the effects of rising costs of doing business as reflected by these results".
If conditions and circumstances take a negative turn, Democrats could lose 40 seats in the House and more than a half dozen in the Senate in the November midterm elections.
"The fixation on testing has been a negative turn of events when the things that engage kids in schools are all being cut," said Randi Weingarten, president of the American Federation of Teachers.
ISTANBUL, Oct. 14 — The chief of the Turkish armed forces has warned that military relations with the United States would take a negative turn if Congress approved the Armenian genocide resolution that was passed by the House Foreign Affairs Committee last week.
Adams, traditionally known as a straight photographer, a manic technocrat who knew what he called the "capacities of the craft" and could squeeze 11 tones of gray from a negative, turns out to be more like a Romantic.
It was a negative turned into a positive".
A negative turning point in this imagined inbound trajectory into membership of the CFL community, however, has been her attendance at two "international" CFL conferences, one in Australia, one in China.
Bay replicated those numbers in Boston, then signed a four-year, $66 million contract with the Mets before last season, but his fortunes have taken a decidedly negative turn in a challenging year and a half in New York.
And beyond the confines of the college campus, the campaign was taking a decidedly negative turn in a flurry of radio and television advertisements.
