The phrase 'backdrop of changing' is correct and can be used in written English
You can use it to refer to a situation or circumstances that are in flux. For example, "The negotiations were set against a backdrop of changing economic conditions."
And he cooked up a witty backdrop of changing vintage film credits with scrambled names.
The labor dispute at the transit system, known as BART, is taking place against a backdrop of changing attitudes toward organized labor in California.
Exploring the complex emotional interplay between the three Haldmarne sisters and their parents against a gloriously evoked backdrop of changing seasons and growing poverty, it brilliantly captures adolescent intensity and the uncertainty of "a world all wrong".
But the book captures the texture of a real, flesh and blood family with all its hopes and follies, setting this portrait against a larger backdrop of changing times.
These discussions are taking place against a backdrop of changing estate tax laws, innovative trust instruments, armies of newly minted wealth advisers, a troubled economy with markets in upheaval and family ties that are complicated by divorce, remarriage, adoption and domestic partnership.
The study argues that HCC is a continual process which should be implemented against the backdrop of changing interests and power balances between stakeholders.
These studies must be conducted against the backdrop of a changing social structure in the region, largely related to major changes in the political and economic environment following independence.
Tributes from friends and colleagues welcomed the award as recognition of a literary great whose fiction captured the anguish of private, inner lives against the backdrop of a changing social order.
In a new book, "Boardwalk of Dreams" (Oxford University Press, $35), Bryant Simon, a professor of history at Temple University, takes a sober look at urban degeneration and regeneration against the backdrop of a changing nation enjoying its post-World War II prosperity, and a burgeoning middle class eager to parade its riches on the Boardwalk.
This part of Clark's career, too, should be understood against the backdrop of a changing Brazil.
Chalmers' journey is examined against the backdrop of the changing national climate for universities as well as local factors within the university itself.
