Word: 一定 (yīdìng)

一定有解决的办法。

Yídìng yǒu jiějué de bànfǎ.

There must be some way to solve this.

他一定会成功。

Tā yídìng huì chénggōng.

He will definitely succeed.

他一定在这里。

Tā yídìng zài zhèlǐ.

He's got to be here.

他一定很爱你。

Tā yídìng hěn ài nǐ.

He must love you.

他一定是校长。

Tā yídìng shì xiàozhǎng.

He must be the principal.

他一定没有多考虑就说了。

Tā yídìng méiyǒu duō kǎolǜ jiù shuōle.

He must have said so without giving it much thought.

他们一定在等你。

Tāmen yídìng zài děng nǐ.

They must be waiting for you.

他们一定很恨我。

Tāmen yídìng hěn hèn wǒ.

They must really hate me.

他们一定意识到发生什么事了。

Tāmen yídìng yìshí dào fāshēng shénme shì le.

I'm sure they're all aware of what happened.

他们一定是美国人。

Tāmen yídìng shì Měiguórén.

They must be Americans.

他们一定要知道这件事。

Tāmen yídìng yào zhīdào zhè jiàn shì.

They must know this.

他们在这个时候一定已经到家了。

Tāmen zài zhège shíhou yídìng yǐjīng dào jiā le.

They must have arrived home by this time.

他听到这个消息，一定会很高兴。

Tā tīngdào zhège xiāoxi, yídìng huì hěn gāoxìng.

He would be very glad to hear the news.

他说的话有一定的道理。

Tā shuō dehuà yǒu yídìng de dàoli.

There is a certain amount of truth in what he's saying.

你一定要回来啊。

Nǐ yídìng yào huílai a.

You've got to come back.

你一定要帮助我们。

Nǐ yídìng yào bāngzhù wǒmen.

You must help us.

你一定要帮帮她。

Nǐ yídìng yào bāng bāng tā.

It is necessary for you to help her.

你一定要注意他的建议。

Nǐ yídìng yào zhùyì tā de jiànyì.

You must pay attention to his advice.

你们全部一定要读。

Nǐmen quánbù yídìng yào dú.

All of you have to read it.

你就算不想做，也一定要做。

Nǐ jiùsuàn bùxiǎng zuò, yě yídìng yào zuò.

You must do it even if you don't want to.

你母亲年轻的时候一定很美。

Nǐ mǔqīn niánqīng de shíhou yídìng hěn Měi.

Your mother must have been beautiful when she was young.

你现在有甚么是一定要做的？

Nǐ xiànzài yǒu shénme shì yídìng yào zuò de?

What must you do now?

你的计划一定会成功的。

Nǐ de jìhuà yídìng huì chénggōng de.

Your plan is sure to succeed.

到外国一定很贵。

Dào wàiguó yídìng hěn guì.

Visiting a foreign country must be expensive.

大房子不一定适合住。

Dà fángzi bù yídìng shìhé zhù.

Large houses are not necessarily comfortable to live in.

她一定在生我的气。

Tā yídìng zài shēng wǒ de qì.

She must be angry with me.

她昨天一定已经做过了。

Tā zuótiān yídìng yǐjīng zuòguole.

She must have done it yesterday.

山不一定是绿色的。

Shān bù yídìng shì lǜsè de.

Mountains are not necessarily green.

微笑并不一定表示高兴。

Wēixiào bìng bù yídìng biǎoshì gāoxìng.

Smiles do not always indicate pleasure.

情况一定会好起来的。

Qíngkuàng yídìng huì hǎo qǐlai de.

I'm sure it'll get better.

我一定会去看他的。

Wǒ yídìng huì qù kàn tā de.

I'll certainly go and see him.

我一定是忘了。

Wǒ yídìng shì wàngle.

I must've forgotten.

我为什么一定要知道呢？

Wǒ wèishénme yídìng yào zhīdào ne?

Why must I know about it?

我为什么一定要那么做？

Wǒ wèishénme yídìng yào nàme zuò?

Why do I have to do that?

我们一定会调查它。

Wǒmen yídìng huì diàochá tā.

We'll be sure to look into it.

我们对此有一定的责任。

Wǒmen duì cǐ yǒu yídìng de zérèn.

We're partly responsible.

我在一定程度上同意你的意见。

Wǒ zài yídìng chéngdù shàng tóngyì nǐ de yìjiàn.

I agree with you to some extent.

我觉得，有些课程一定有人学。

Wǒ juéde, yǒuxiē kèchéng yídìng yǒurén xué.

I think some lessons have definitely been learned.

煤并不一定都是黑的。

Méi bìng bù yídìng dū shì hēi de.

Coal is not always black.

要是去北京的话，一定要看一下天安门广场。

Yàoshi qù Běijīng dehuà, yídìng yào kàn yíxià Tiān'ānménguǎngchǎng.

If you go to Beijing, definitely have a look at Tiananmen Square.

这一定是假的。

Zhè yídìng shì jiǎ de.

These must be fake.

这一定是我。

Zhè yídìng shì wǒ.

It has to be me.

这个方法一定会成功。

Zhège fāngfǎ yídìng huì chénggōng.

This method is sure to work.

这封信一定要用英文写吗？

Zhè fēng xìn yídìng yào yòng Yīngwén xiě ma?

Must this letter be written in English?

这并不容易，但我一定做到的！

Zhè bìng bù róngyì, dàn wǒ yídìng zuòdào de!

It's hard, but I'm going to make it!