1·Barons had to swear an oath of allegiance to the king.
贵族须宣誓效忠国王。
—— 《牛津词典》
2·Before giving evidence, a witness has to swear an oath.
作证之前，证人必须宣誓。
3·Don't I need to swear an oath?
我难道不需要发个誓什么的？
4·In court you have to swear an oath that you will tell the truth.
在法庭上你必须发誓我自己说的一切话都是真的。
5·After being endorsed, the new cabinet will need to swear an oath of allegiance to His Majesty the King.
在获得批准之后，新内阁还将要宣誓效忠国王。
6·My father made me swear an oath and said, "I am about to die; bury me in the tomb I dug for myself in the land of Canaan."
我父亲要死的时候叫我起誓说，你要将我葬在迦南地，在我为自己所掘的坟墓里。
7·However, he also instituted a hierarchical system of levels among his followers, and had them swear an oath on his core tenets.
不过，他也在追随者中间立了标准等级制度，它让追随者以他的核心信条宣誓。
8·And my master made me swear an oath, and said, 'You must not get a wife for my son from the daughters of the Canaanites, in whose land I live.
我主人叫我起誓说：你不要为我儿子娶迦南地的女子为妻。
9·And they all answered him and said: 'Let us all swear an oath, and all bind ourselves by mutual imprecations not to abandon this plan but to do this thing.
他们就一起回答他说：“让我们一起发誓，用诅咒将我们绑在一起，不放弃这个计划，大家一起去做这件事。”
10·But Jacob said, "Swear to me first." So he swore an oath to him, selling his birthright to Jacob.
雅各说：“你今日对我起誓吧。”以扫就对他起了誓，把长子的名分卖给雅各。