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?
Their dishes are both good and cheap.
他们 的 菜 又 好吃 又 便宜。
Tāmen de cài yòu hàochī yòu piányi.
Was the cellphone that you’ve bought expensive?
你 买 的 手机 贵 不 贵?
Nǐ mǎi de shǒujī guì-bu-gui?
The more people are there, the more expensive the stuff is.
人 越 多 东西 越 贵。
Rén yuè duō dōngxi yuè guì.
This is more expensive than that.
这个 比 那个 贵。
<Zhège bǐ nàge guì.>
Is the fruits in China expensive?
在 中国 水果 贵 不 贵?
Zài Zhōngguó shuǐguǒ guì-bu-gui?