以下是一些“毕业快乐”的英文连笔写法，供您参考：

  1. Happy Graduation!

  2. Wishing You a Graduation Day!

  3. Cheers to Your Graduation!

  4. Happy Graduation! Wishing You All the Best!

  5. Celebrating Our Graduates! Happy Graduation!

  6. From Our Hands to Yours: Happy Graduation!

  7. Graduation is Here: Happy and Proud!

  8. Celebrating Your Achievement: Happy Graduation!

  9. Here’s to Our Graduates’ Future: Happy Graduation!

  10. Happy Graduation, Everyone!

这些连笔写法简洁明了，适合在各种场合表达对毕业生的祝福和喜悦。您可以根据个人喜好选择使用。