英文贺卡的格式通常包括以下几个部分：

1. Inside Left (内侧左页) 这是对收件人的个人问候和祝福。

```

[Your Name/Your Company]

[Your Address]

[City, State, Zip Code]

[Email Address]

[Phone Number]

[Date]

[Inside Left]

[Inside Right]

```

```

[Inside Left]

Dear [Name],

I hope this card finds you well. I wanted to take a moment to express my gratitude for all the wonderful things you have done for me. Your kindness and support mean the world to me.

Wishing you a day filled with joy and laughter.

Sincerely,

[Your Name]

```

2. Inside Right (内侧右页) 这是给收件人的额外信息或签名。

```

[Inside Right]

[Your Name/Your Company]

[Your Address]

[City, State, Zip Code]

[Email Address]

[Phone Number]

[Date]

[Inside Right]

```

```

[Inside Right]

P.S. I hope we can catch up soon!

```

3. Front (正面) 通常包括贺卡的主题和装饰。

```

[Front]

[Your Name/Your Company]

[Your Address]

[City, State, Zip Code]

[Email Address]

[Phone Number]

[Date]

[Front]

```

```

[Front]

Happy Birthday!

```

4. Back (背面) 如果背面是空白的，可以用于写收件人的地址。

```

[Back]

[Recipient's Name]

[Recipient's Address]

[City, State, Zip Code]

```

以下是一个完整的英文贺卡示例：

```

[Your Name/Your Company]

[Your Address]

[City, State, Zip Code]

[Email Address]

[Phone Number]

[Date]

Front:

Happy Birthday!

Inside Left:

Dear [Name],

I hope this card finds you well. I wanted to take a moment to express my gratitude for all the wonderful things you have done for me. Your kindness and support mean the world to me.

Wishing you a day filled with joy and laughter.

Sincerely,

[Your Name]

Inside Right:

P.S. I hope we can catch up soon!

Back:

[Recipient's Name]

[Recipient's Address]

[City, State, Zip Code]

```