我发誓是真的英语怎么说

“我发誓是真的”对应的英文单词有：i cross my heart ，一共1个，具体意思及用法如下：

i cross my heart"I Cross My Heart" is the title of a song written by Steve Dorff and Eric Kaz, and recorded by American country music artist George Strait. It was released in September 1992 as the lead-off single to his album Pure Country, which is also the soundtrack to the movie of the same title.