WANT SOMETHING

I don't want this, I want that.
我 不 要 这个,我 要 那个。
<Wǒ bùyào zhège, wǒ yào nàge.>
Do you want this?
你 要 这个 吗?
Nǐ yào zhège ma?
I want this tea.
我 要 这个 茶。
Wǒ yào zhège chá.
Do you want it as well?
你 也 要 这个 吗?
Nǐ yě yào zhège ma?
What do you want?
你 要 什么?
<Nǐ yào shénme?>
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?

WANT TO DO STH

I wanna tell you a story.
我 想 给 你 讲 故事。
Wǒ xiǎng gěi nǐ jiǎng gùshì.
I will (want to) have a juice.
我 要 喝 果汁。
<Wǒ yào hē guǒzhī.>
I will have (eat) fried noodles.
我 要 吃 炒面。
Wǒ yào chī chǎomiàn.
What will you eat? / What do you want to eat?
你 要 吃 什么?
Nǐ yào chī shénme?
What will you eat? / What do you want to eat?
你 要 吃 点 什么?
Nǐ yào chī diǎn shénme?
I want to ask you one thing.
我 想 问 你 一个 问题。
Wǒ xiǎng wèn nǐ yīge wèntí.