“每况愈下”常见的英文表达有 “go from bad to worse” 或 “get worse and worse”。
“go from bad to worse” 是一个比较地道的表达，强调情况在不断恶化，程度逐渐加深，例如：The company's financial situation has gone from bad to worse in recent years.（近年来，该公司的财务状况每况愈下。 ）
“get worse and worse” 同样表达事情变得越来越糟糕，语义直白，例如：His health has been getting worse and worse since he retired.（自从退休后，他的健康状况每况愈下。 ）