1) He swore to abstain from smoking.
他发誓要戒烟。
2) He took an oath to give up smoking.
他发誓戒烟。
3) He swore that he could tell the truth.
他发誓要说真话。
4) He pledges to tell the truth.
他发誓要说实话。
5) He vowed obedience.
他发誓要服从。
6) swear off
发誓戒除
参考词条