swear on my life 以生命起誓
swear on the Bible 以圣经起誓
swear on honor 以荣誉起誓
swear on oath 宣誓保证
swear on someone’s name 以某人名义起誓
1. I swear on my mother's life that I am telling the truth.
我以母亲的生命起誓，我说的是实话。
2. He swore on the Bible during the testimony.
他在作证时以圣经起誓。
3. She swears on her honor that she will return the money.
她以自己的荣誉起誓会归还这笔钱。
4. They swore on their friendship to keep the secret.
他们以友谊起誓保守这个秘密。
A: I swear on my life I didn’t take your notebook.
A：我以性命起誓，我没有拿你的笔记本。
B: I believe you, but please be more careful next time.
B：我相信你，但下次请更小心。
1) 以神圣或重要事物起誓以增强可信度
2) 用于强调说话内容的真实性
3) 在正式或法律场景中作出庄严承诺
1. 以某物起誓；强调承诺或真实性
e.g.I swear on my honor that I will not lie.
我以荣誉起誓绝不说谎。
phrasal verb
1. To make a solemn promise or statement by invoking something sacred or important as proof of truth.
Synonym: vow by, pledge on