What are the problem areas that an intermediate learner may have?

Intermediate learners often struggle with complex grammatical structures, such as advanced verb tenses and conditional sentences, which can lead to errors in speaking and writing. They may also face challenges with vocabulary, particularly in using idiomatic expressions and nuanced meanings. Additionally, pronunciation and intonation can be problematic, affecting their overall fluency and comprehensibility. Lastly, maintaining a natural flow in conversation may be difficult, resulting in hesitation or reliance on simpler language.