swear by
If you swear by something, you believe that it can be relied on to have a particular effect.
Many people swear by vitamin C's ability to ward off colds.
很多人深信维生素C能预防感冒。
swear in
When someone is sworn in, they formally promise to fulfill the duties of a new job or appointment.
Mary Robinson was formally sworn in as Ireland's first woman president.
作为爱尔兰的首任女总统,玛丽·鲁宾逊正式宣誓就职。
swears , swearing , swore , sworn
If someone swears, they use language that is considered to be vulgar or offensive, usually because they are angry.
It's wrong to swear and shout.
乱喊乱骂是不对的。
If you swear to do something, you promise in a serious way that you will do it.
Alan swore that he would do everything in his power to help us.
艾伦承诺会尽其所能帮助我们。
We have sworn to fight cruelty wherever we find it.
我们发誓只要看到暴行就会顽强抗争。
If you say that you swear that something is true or that you can swear to it, you are saying very firmly that it is true.
I swear I've told you all I know.
我发誓已经把我所知道的都告诉你了。
I swear on all I hold dear that I had nothing to do with this.
我拿身家性命担保我与这件事情无关。
If someone is sworn to secrecy or is sworn to silence, they promise another person that they will not reveal a secret.
She was bursting to announce the news but was sworn to secrecy.
她迫不及待想发布这个消息,但她发过誓要保密的。