Translation of "Swore" in Chinese

The knight swore an oath of allegiance to the king.

騎士宣誓效忠於國王。

The two lovers swore to love each other for eternity.

两个恋人发誓永远相爱。

You will say and do things your parents said and did, even if you swore you would never do them.

你的言行会跟你的父母一样，即使你曾发誓你永远不会这么做。