Translation of "Swear" in Chinese

I don't swear.

我不会发誓/我无法发誓。

He didn't half swear.

他直言不諱

Did that lady just swear?

那个小姐刚才说粗话啊？

They just taught me to swear.

他们就教我脏话来着。

I swear, I saw an alien!

我发誓我看到了外星人。

I swear I didn't do anything.

我发誓我什么也没做。

- I swear I will never do such a thing.
- I swear I'll never do such a thing.
- I swear that I'll never do such a thing.

我发誓我不会做这种事。

I'm not lying. I swear to God!

我向天地神明发誓我的话绝无一丝虚假。

I could swear there's something inside this box.

我能发誓这箱子里有东西。