I can't come to your birthday party..格式对不？

一般用比较委婉的表达
I'd love to attend your birthday party but...（随便找个理由）

格式对

不对，应把come改成go

这个格式是对，但是比较中文化。
最好应是:I can't be at your birthday party.
I can't attend your birthday party.

come是来应该改成go

对