EXPENSIVE
(TO BE)

guì
CHEAP
便宜
piányì

Is the clothes, that you are wearing, expensive?
你 今天 穿 的 衣服 贵 吗?
Nǐ jīntiān chuān de yīfu guì ma?
The restaurant, that we go to, is neither expensive nor cheap.
我们 去 的 饭店 不 贵 也 不 便宜。
Wǒmen qù de fàndiàn bù guì yě bù piányì.
Is the fruits in China expensive?
在 中国 水果 贵 不 贵?
Zài Zhōngguó shuǐguǒ guì-bu-gui?
Could you give it to me a bit cheaper?
你 能 不能 给 我 便宜?
Nǐ néng bùnéng gěi wǒ piányi?
This is 20kuai more expensive than that.
这个 比 那个 贵 20 块。
<Zhège bǐ nàge guì 20 kuài.>
Was the cellphone that you’ve bought expensive?
你 买 的 手机 贵 不 贵?
Nǐ mǎi de shǒujī guì-bu-gui?