"越 ... 越..."
(yuè... yuè...)
is usually used to express certain state
which is increasing with time, or in tune with another factor.
There are two forms of this pattern, the "simple" one (using 来),
and the more complex one (which uses two different adjectives/verbs)
in Chinese grammar.
Sentence Structure of 越来越
This structure expresses that something is becoming more and more adjective over time, with the latter adjective changing with the verb. The most common structure is:
subject+越来越+Adjective
Examples
Qì yóu yuè lái yuè ɡuì.
汽油 越 来 越 贵。
Gasoline is getting more and more expensive.
Complex Structure with 越 ... 越 ...
This structure can be expanded further by replacing 来 with another verb. This expresses that one change causes another change. To be exact, there are four structures to use. (The examples make it clear how this works.)
Structure 1
subject+越+Adjective 1+越+Adjective 2
Examples
Tiǎo zhàn yuè dà, wǒ yuè xīnɡ fèn.
挑战 越 大，我 越 兴奋。
The bigger the challenge is, the more excited I am.
Structure 2
subject+越+Adjective，越+verb
Examples
Tā yuè bù ɡāo xìnɡ, jiù yuè bù shuō huà.
她 越 不高兴，就 越 不说话。
The more upset , the less she talks.
Structure 3
subject+越+verb，越+verb
Examples
Wǒ yuè xué xí zhōnɡ wén, yuè jué dé zhōnɡ wén hěn nán.
我 越 学习 中文，越 觉得 中文 很 难。
The more I study Chinese, the more difficult I think it is.
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