The phrase "a certain couple" is correct and usable in written English.
It can be used when referring to a specific couple without naming them directly, often in a narrative or descriptive context.
Example: "There was a certain couple who always sat at the same table in the café, sharing stories and laughter."
Alternatives: "a particular couple" or "one specific couple".
For some good reasons, though, and some sentimental ones, too, you stop questioning the authenticity of Woodstock itself when you discover why Kopple chose a certain couple as interview subjects.
Still, he has engaged in penguin gossip with other zookeepers about who nipped whom, and about the nest-swapping habits of a certain couple that had many a beak flapping (O.K., it was Georgey and Terry).
Gael Greene, a former food critic for New York magazine, recalls the days when a seat at the restaurant was so sought after that "a certain couple had the table next to the front door every night, where they were whipped by sables, and they loved it".
MR: Now, the front cover of Hometown Frolics features a certain couple of rascally kids.
But a certain couple, Ananias and Sapphira, concealed some of their property and did not place it at the disposal of the community.
The week's theme won't be the only reason temperatures start to rise, since the episode will also see a certain couple growing closer, with their flirtation even coming to the attention of vocal coach Nikki Anders.
The factor shows the sensitivity of the vibrational energy flow to a certain coupling loss factor and hence the associated path.
However, the consideration of North Atlantic marine records reveals a certain coupling between North Atlantic coolings, atmospheric processes leading to arid climate over large parts of Spain, as well as increased landscape instability including strong fluvial sedimentation activity.
Yet, regions of three-phase coexistence only exist below a certain coupling strength Λ*.
Ross said she and her date felt just like a certain famous couple.
Wouldn't a clone of a certain famous couple's kid become a hot commodity on the black market?
