Word: 理由 (lǐyóu)

他们不需要理由。

Tāmen bù xūyào lǐyóu.

They don't need a reason.

他们没有理由叫我们离开。

Tāmen méiyǒu lǐyóu jiào wǒmen líkāi.

They had no reason to ask us to leave.

他有充分的理由这样做。

Tā yǒu chōngfèn de lǐyóu zhèyàng zuò.

He had every reason for doing so.

你有充分的理由生气。

Nǐ yǒu chōngfèn de lǐyóu shēngqì.

You have good reason to be angry.

你有很好的理由这样说。

Nǐ yǒu hěn hǎo de lǐyóu zhèyàng shuō.

You have every reason to say so.

你有更好的理由吗？

Nǐ yǒu gèng hǎo de lǐyóu ma?

Do you have a better explanation?

你没理由生气。

Nǐ méi lǐyóu shēngqì.

You didn't have any reasons to be angry.

你的理由很充分。

Nǐ de lǐyóu hěn chōngfèn.

Your reason is very good.

你的理由我都听够了。

Nǐ de lǐyóu wǒ dōu tīng gòu le.

I've had enough of your excuses.

可以告诉我理由吗？

Kěyǐ gàosu wǒ lǐyóu ma?

Am I allowed to know the reason?

我们有充分的理由相信这是真的。

Wǒmen yǒu chōngfèn de lǐyóu xiāngxìn zhè shì zhēnde.

We have full reason to believe that it is true.

我没有特别的理由去做。

Wǒ méiyǒu tèbié de lǐyóu qù zuò.

I have no particular reason to do so.

没有理由害怕。

Méiyǒu lǐyóu hàipà.

There's no reason to be afraid.

没有理由生气。

Méiyǒu lǐyóu shēngqì.

There's no reason to get angry.

这才算一个充分的理由。

Zhè cái suàn yí gè chōngfèn de lǐyóu.

Now that's a good reason.

那就是他生气的理由。

Nà jiùshì tā shēngqì de lǐyóu.

That is why he got angry.

那是我在这里的另外一个理由。

Nà shì wǒ zài zhèlǐ de lìngwài yí gè lǐyóu.

That's the other reason I'm here.