给英语作业评语时，可以采用鼓励与指导并重的方式，帮助学生提高英语水平。以下是一些常用的评语表达方式：

1. **鼓励与肯定**：“Your effort in this assignment is truly commendable. Keep up the good work and continue to explore the nuances of the English language.”

2. **具体表扬**：“You have demonstrated a strong grasp of vocabulary and sentence structure in your writing. Your use of idiomatic expressions is particularly impressive.”

3. **建议与指导**：“While your essay is well-structured, consider expanding on the cultural context of the topic to enrich your argument. This will enhance your understanding and presentation of ideas.”

4. **指出不足**：“It’s great that you’ve chosen to write about this topic, but there are some grammatical errors that need attention. Pay special attention to verb tenses and subject-verb agreement in future assignments.”

5. **鼓励尝试新事物**：“Your creativity shines through in your storytelling, but try incorporating more descriptive language to paint a clearer picture for your readers.”

6. **总结反馈**：“Overall, you’ve made significant progress in this assignment. Keep practicing and don’t hesitate to ask for feedback to further refine your skills.”

7. **个性化建议**：“Given your strengths in grammar, I suggest focusing on developing a wider range of vocabulary and improving fluency in spoken English.”

通过这些评语，不仅能有效地指出学生的优点和需要改进的地方，还能激发学生的学习兴趣和自信心。