swearv.咒骂；发誓；宣誓n.誓言；咒骂；发誓swear on the Bible把手搁在(圣经)上发誓swear to something断言某事swear in a witness让证人起誓作证swear an affidavit写下宣誓证词swear by this pill相信这种药丸有效swear like a piratev.大骂swear out a warrant发出逮捕证swear like a bargee满口粗话swear-in ceremony宣誓就职仪式swear in a mayor.使市长宣誓就职

1. Before giving evidence you have to swear an oath.
   在作证之前你得先发誓。
2. I promise on my honor not to tell lies.
   我发誓我不会说谎。