-er and –er / more and more ~
It is raining harder and harder. 雨越下越大。
The typhoon becomes more and more violent. 暴风雨越来越猛烈。
The cost of living is getting higher and higher.
It's more and more difficult to find a good job.
As I was waiting for my interview, I became more and more nervous.
As the girl became afraid, she walked faster and faster.
You'll find the story more and more complicated when you read on.