大人的英语该怎么说

"Adult English" or "advanced English" are both ways to describe English language skills that are more developed or more sophisticated than those of a beginner. Alternatively, you could describe someone as having "fluent" or "proficient" English if they are able to speak, read, and write in English at a high level. It's also possible to describe someone as having "native-like" English if their skills in the language are comparable to those of a native speaker. Ultimately, the term you use to describe someone's English skills will depend on the context and the specific skills or abilities that you want to emphasize.