“祝贺你，”他真诚地说。用英语怎么说？

“祝贺你，”他真诚地说。

"Congratulations," he said sincerely.

congratulations

n. 祝贺，贺词，祝词；

例句
I said congratulations and walked over to him and shook his hand...
我向他表示祝贺，并走过去和他握手。

he

pron. 他，它，一个人；n. 雄性动物；

例句
Logic had prevailed and he had abandoned the idea.
最终理智占了上风，他打消了那个念头。

said

adj. [律]上述的，少说为妙，（做）某事有/没有很多优点（或好处）：某事物有/没有多少可说的，说到底；v. 说，讲( say的过去式和过去分词 )，表明，念，说明；

例句
They said goodbye to him as he got aboard the train at Union Station.
当他在联合火车站登上火车之际，他们向他道别。

sincerely

adv. 真诚地，诚恳地，谆；

例句
Maybe he sincerely wanted to help his country...
或许他是诚心诚意地想帮助自己的祖国。