你发誓用英语

swear 和 pledge 都可以的

发誓：swear

1.swear[swZE]vi.诅咒v.宣誓, 发誓2.pledge[pledV]n.保证, 誓言, 抵押, 抵押品vt.保证, 使发誓, 抵押, 典当, 举杯祝...健康3.vow[vaJ]n.誓约v.宣誓, 立誓, 发誓4.take an oathv.宣誓, 发誓

swear （多用普通口语） i swear XXXvow （用于稍正式场合）pledge 保证take a oath （一般用于就职宣誓）

swear 就好

发誓 [fā shì]n. vow ; pledgevt. swearmisc. make an oath短语你发誓 cross your heart ; cross your listent 再次发誓 Swear it again

I swear……

发誓: 1. to vow2. to pledge3. to swearRelative explainations: Examples:1. 他发誓要戒烟。 He swore to abstain from smoking.2. 骑士发誓要为他父亲向敌人报仇。 The knight swore he would revenge his father's death.3. 他发誓永远爱她。 He swore to love her for evermore.4. 他们发誓要忠实履行自己的职责。 They swore an oath to carry out their duties faithfully.5. 他已经发誓对这件事保密。 He has been sworn to secrecy about this.6. 战士们发誓战斗到底。 The soldiers swore to fight it out.7. 我对万能的上帝发誓我要说真话。 I swear by Almighty God that I will tell the truth.8. 他们发誓要向绑架者报仇. They swore to take their revenge on the kidnappers. To utter curses; swear.诅咒；发誓To make a vow; promise.发誓；许诺Take the vows of a nun.发誓成为一个尼姑To renounce or repudiate under oath.放弃，发誓抛弃He took an oath to give up smoking.他发誓戒烟。To renounce under oath; forswear.发誓放弃；发誓革除I've sworn off smoking.我已发誓戒烟。He vowed obedience.他发誓要服从。To disavow under oath; deny.发誓否认；坚决否认Abjure one's beliefs.发誓放弃某人的信仰

swear 是字面翻译的。有首歌是： I Swear（我发誓）promise表达更为婉转。