Yes, you can use English textbooks for CBSE Class 9 as a reference for other competitive exams. Here's why:

1. Comprehensive Coverage:
The English textbooks for CBSE Class 9 are designed to cover a wide range of topics and concepts related to English language and literature. They provide a comprehensive foundation of English language skills, including grammar, vocabulary, reading comprehension, writing skills, and literary analysis. This comprehensive coverage makes them a valuable resource for competitive exams that require proficiency in the English language.

2. Strong Language Skills:
Competitive exams often assess a candidate's language skills, which include grammar, vocabulary, and reading comprehension. The English textbooks for CBSE Class 9 focus on developing these language skills through various exercises, examples, and practice questions. By studying these textbooks, you can strengthen your language skills, which will be beneficial for competitive exams.

3. Literary Analysis:
Many competitive exams have sections or questions related to literary analysis, where candidates are required to analyze and interpret literary texts. The English textbooks for CBSE Class 9 introduce students to a variety of literary genres, such as poetry, prose, and drama. They provide critical insights into these texts, teaching students how to analyze themes, characters, literary devices, and more. This knowledge can be applied to competitive exams that have a literature component.

4. Enhancing Writing Skills:
Writing skills are crucial for many competitive exams, including essay writing, letter writing, or descriptive answers. The English textbooks for CBSE Class 9 include exercises and tips to improve writing skills, such as organizing ideas, structuring paragraphs, using appropriate vocabulary, and maintaining coherence. By practicing these writing techniques, you can enhance your ability to express yourself effectively in written form, which is advantageous for competitive exams.

5. Building Vocabulary:
A strong vocabulary is essential for understanding and expressing ideas fluently. The English textbooks for CBSE Class 9 introduce new words and provide exercises to expand vocabulary. By regularly studying and revising the vocabulary from these textbooks, you can improve your word power, which will help you in competitive exams that test vocabulary skills.

Conclusion:
The English textbooks for CBSE Class 9 are a valuable reference for competitive exams due to their comprehensive coverage, focus on language skills, literary analysis, writing practice, and vocabulary building. By utilizing these textbooks as a resource, you can enhance your preparation and increase your chances of performing well in competitive exams.