英语作文中家长意见的写作可以遵循以下几个要点：

开头问候

首先可以简短地问候老师，例如：“Dear Mr./Ms. [Teacher's Last Name],”

表达感谢

对老师对孩子的教导表示感谢，例如：“Thank you very much for your dedication to teaching [Child's Name].”

孩子表现概述

简要总结孩子在英语学习方面的整体表现，例如：“Over the past [period], [Child's Name] has shown a good understanding and effort in English learning.”

具体表现

列举孩子在英语学习中的具体表现，例如：“[Child's Name] has been actively participating in English class discussions and has shown improvement in listening and speaking skills.”

存在问题及建议

如果有必要，可以指出孩子在学习中存在的问题，并提出改进建议，例如：“However, [Child's Name] sometimes struggles with [specific issue, e.g., grammar] and could benefit from more practice in [specific area].”

鼓励与期望

鼓励孩子继续努力，并对他们在未来取得更好的成绩表达期望，例如：“We encourage [Child's Name] to continue working hard and to strive for excellence in all subjects.”

结束语

最后，可以再次感谢老师，并表达家长对孩子未来的美好祝愿，例如：“Once again, thank you for your support and guidance. We look forward to [Child's Name]'s continued success in the new semester.”

签名

签上家长的名字，例如：“Sincerely, [Parent's Name]”

示例：

```

Dear Mr./Ms. Smith,

Thank you very much for your dedication to teaching Emily. Over the past semester, Emily has shown a good understanding and effort in English learning. She has been actively participating in class discussions and has shown improvement in listening and speaking skills.

However, Emily sometimes struggles with grammar and could benefit from more practice in writing. We encourage her to continue working hard and to strive for excellence in all subjects.

Once again, thank you for your support and guidance. We look forward to Emily's continued success in the new semester.

Sincerely,

[Parent's Name]

```

通过以上步骤和示例，您可以撰写出一份既具体又有建设性的家长意见。