以下是一些英语教师节的贺卡内容：

1. "You taught me to aim for success and to accept failure with courage. Happy Teachers' Day."（您教导我们追求成功并有勇气接受失败。祝教师节快乐!）

2. "Warm thoughts of love and regards to our loving teachers."（对敬爱的老师献上我们的爱与关怀）

3. "I want to be like you, when I grow up."（我长大也要像你一样）

4. "Teacher, you light up my heart, thank you."（老师，你点亮我的心，谢谢。）

5. "Happy Teachers' Day and a sweet smile!"（祝您教师节心情美，笑容甜!）

6. "It is a time to be grateful to all teachers. This profession deserves the special recognition and respect."（这是一个感谢所有老师的时刻。这个职业值得特别的认可和尊重。）

7. "You are like a third parent. We all love you and respect you."（您就像我们的家长，我们都敬爱您。）

8. "We all like having you as our teacher. You have our respect and gratitude."（我们喜欢您做我们的老师，我们尊敬您、感激您。）

9. "Three years passed, and everything turned into the yellow picture. Miss the playground, miss the classroom, more miss you! My teacher!"（三年过去了，一切都变成了黄色的照片。想念操场，想念教室，更想念您!我的老师!）

10. "I am not your best student, but you are my most reverent teacher. On your holiday, your students wish you to be young forever!"（我不是您最好的学生，但您是我最尊敬的老师。在您的假期，您的学生希望您永远年轻!）

11. "When your hair becomes white, you have students all over the world. Dear teacher, it's hard to say to you!"（当您的头发变白时，您将有来自世界各地的学生。亲爱的老师，很难对您说!）

这些贺卡内容既表达了对老师的感激之情，也包含了对老师的敬爱和祝福。您可以选择其中一句或结合几句，根据您与老师的个人关系以及您的感激之情来撰写您的贺卡内容。