congratulations to you和congratulation to you有区别吗？

congratulation作不可数时意为“祝贺”，用于一般句中，例如：He gave a speech of congratulation for the winner. He gave sincere congratulation to him.等
congratulation作可数时只用复数形式，即congratulations，其用法有两种
1.表示“贺词”，如：offer sb's congratulations on his success
2.用作感叹词，如：Congratulations! Congratulations to you!Congratulations on winning the prize!等

一般都要在congradulation后加s
后一种的说法是错的 。