When explaining why you want to pursue postgraduate studies in English, you can consider the following aspects:

Academic Passion and Interest: Express your deep interest and enthusiasm for the field of study. Share your feelings and gains during your undergraduate years, as well as your desire to further delve into this area.

Professional Development: Explain how pursuing a master's degree will help you gain a higher level of academic platform or research opportunities, enabling you to pursue more specialized and challenging careers.

Academic Improvement: Describe how you hope to enhance your professional skills and knowledge through graduate studies, which will contribute to better career prospects.

Research Interests and Goals: Talk about any research projects or topics you have been involved in during your undergraduate studies and your specific contributions and learnings. Also, discuss your future research directions and the problems you hope to address in your graduate studies.

Academic Achievements and Honors: Mention any academic achievements and honors you have received, such as scholarships or publications, to demonstrate your academic capability and potential.

Competitiveness in the Job Market: Highlight the competitiveness of a graduate degree in the job market and how it can serve as a stepping stone for better career advancement.

Personal Growth and Expansion: Emphasize that graduate school is a process of personal growth, offering opportunities to expand your knowledge, abilities, and horizons, which will lay a strong foundation for future success.

Fulfillment of Personal Dreams and Values: Express your aspirations to become an expert or scholar in a specific field and to make meaningful contributions to society through your research and work.

Remember to provide specific examples and personal anecdotes to illustrate your points and make your explanation more engaging and memorable.