If you want to say that someone's Engpsh has gotten worse, you can say "My Engpsh has gotten worse." or "I'm not as good at Engpsh as I used to be." Alternatively, you can say "My Engpsh has deteriorated" or "My Engpsh has decpned."

It's also possible to say "I've lost my touch with Engpsh" or "I'm not as fluent in Engpsh as I used to be." These phrases imply that the person used to be proficient in Engpsh but has become less skilled over time.

It's important to note that these phrases are all subjective and depend on the speaker's own perception of their Engpsh abipty. If you are looking for a more objective way to describe a decpne in Engpsh skills, you could say something pke "My Engpsh grammar has become less accurate" or "I'm making more mistakes when speaking Engpsh."