WANT SOMETHING

How many bottles of beer do you want?
你们 要 几 瓶 啤酒?
Nǐmen yào jǐ píng píjiǔ?
Do you want (it)?
你 要 吗?
<Nǐ yào ma?>
Who wants this?
谁 要 这个?
Shéi yào zhège?
Then I really don't want it.
那 我 真的 不 要 了。
Nà wǒ zhēnde bùyào le.
Do you want (it)?
你 要 不 要?
Nǐ yào bu yao?
Do you want (it) as well?
你 也 要 吗?
<Nǐ yě yào ma?>

WANT TO DO STH

I will have (eat) fried noodles.
我 要 吃 炒面。
Wǒ yào chī chǎomiàn.
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.
What meat will you eat? What meat do you want to eat?
你 要 吃 什么 肉?
Nǐ yào chī shénme ròu?
What will you (do you want to) drink?
你 要 喝 什么?
<Nǐ yào hē shénme?>
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.>
What would you like to eat?
你们 想 吃 点 什么?
Nǐmen xiǎng chī diǎn shénme?