Yes, the NCERT English textbook can be used as a reference for improving communication skills in the future.

The NCERT English textbook for class 4 is designed to develop the language skills of students at an early age. It covers various aspects of communication such as reading, writing, listening, and speaking. By using this textbook as a reference, students can enhance their communication skills in the following ways:

1. Vocabulary Development:
The textbook introduces a wide range of vocabulary through different stories, poems, and exercises. By reading and understanding these texts, students can expand their vocabulary, which will improve their ability to express themselves effectively in future communication.

2. Reading Comprehension:
The textbook includes various reading passages that require students to comprehend the content and answer questions based on it. This practice helps in developing reading comprehension skills, which are essential for understanding written information in different contexts.

3. Grammar and Sentence Structure:
The textbook focuses on teaching grammar concepts and sentence structures in a simplified manner. By studying and practicing these concepts, students can improve their grasp of English grammar, which will enable them to construct grammatically correct sentences while communicating.

4. Listening Skills:
The textbook includes audio resources that provide opportunities for students to listen to spoken English. By listening to these resources, students can enhance their listening skills, including understanding pronunciation, intonation, and overall communication patterns.

5. Speaking Skills:
The textbook encourages students to participate in various speaking activities such as role-plays, discussions, and presentations. By engaging in these activities, students can improve their pronunciation, fluency, and overall speaking skills.

6. Writing Skills:
The textbook offers opportunities for students to practice their writing skills through exercises such as letter writing, story writing, and descriptive writing. By practicing these writing tasks, students can develop their ability to express their thoughts and ideas coherently in written form.

7. Cultural Awareness:
The textbook incorporates stories and texts from different cultures, which helps students develop an appreciation for diversity and cultural awareness. This understanding of different cultures can contribute to effective communication in a globalized world.

In conclusion, the NCERT English textbook for class 4 provides a comprehensive foundation for improving communication skills in the future. By utilizing the vocabulary, reading passages, grammar concepts, listening resources, speaking activities, writing exercises, and cultural content present in the textbook, students can enhance their overall communication abilities, which will be beneficial in their personal and professional lives.