Word: 发誓 (fāshì)

乱发誓会遭雷劈的。

Luàn fāshì huì zāo léi pī de.

If you swear reckless oaths, lightning will strike you.

我发誓再也不和她说话了。

Wǒ fāshì zàiyě bù hé tā shuōhuàle.

I vowed that I would never speak to her again.

我发誓再也不跟她说话了。

Wǒ fāshì zàiyě bù gēn tā shuōhuàle.

I vowed that I would never speak to her again.

我发誓我不会做这种事。

Wǒ fāshì wǒ búhuì zuò zhèzhǒng shì.

I swear I will never do such a thing.

我发誓我什么也没做。

Wǒ fāshì wǒ shénme yě méi zuò.

I swear I didn't do anything.

我发誓我看到了外星人。

Wǒ fāshì wǒ kàndàole wàixīngrén.

I swear, I saw an alien!

我发誓，这次真不一样。

Wǒ fāshì, zhècì zhēn bù yíyàng.

I swear, this time it's truly different.

我对自己发誓今后不会再那么做。

Wǒ duì zìjǐ fāshì jīnhòu búhuì zài nàme zuò.

I promised myself that I would never do that again.

我能发誓这箱子里有东西。

Wǒ néng fāshì zhè xiāngzi lǐ yǒu dōngxi.

I could swear there's something inside this box.