WANT SOMETHING

You don't want even a little?
你 一点 也 不 要 吗?
<Nǐ yīdiǎn yě bù yào ma?>
Then I really don't want it.
那 我 真的 不 要 了。
Nà wǒ zhēnde bùyào le.
There are many things here, which one do you want?
这里 有 很多 东西,你 要 哪个?
Zhè li yǒu hěnduō dōngxi, nǐ yào nǎge?
I don't want anything.
我 什么 都 不 要。
<Wǒ shénme dōu bù yào.>
I don't want this.
我 不 要 这个。
Wǒ bù yào zhège.
I want this tea.
我 要 这个 茶。
Wǒ yào zhège chá.

WANT TO DO STH

I will (I want to) drink tea.
我 要 喝 茶。
Wǒ yào hē chá.
I wanna tell you a story.
我 想 给 你 讲 故事。
Wǒ xiǎng gěi nǐ jiǎng gùshì.
I want to buy a cell phone. Where is it cheapest to buy?
我 想 买 手机。在 哪里 买 最 便宜?
<Wǒ xiǎng mǎi shǒujī, zài nǎli mǎi zuì piányi?>
I want to exchange 500 dollars to rmb.
我 想 把 五百 美元 换成 RMB。
Wǒ xiǎng bǎ wǔbǎi měiyuán huàn chéng RMB.
I want to ask you one more thing.
我 还 想 问 你 一个 问题。
Wǒ hái xiǎng wèn nǐ yīge wèntí.
I want to show you a very pretty thing.
我 想 给 你 看 很 漂亮 的 东西。
<Wǒ xiǎng gěi nǐ kàn hěn piàoliang de dōngxi.>