as (X, then Y), with, in accordance with, in proportion to
Verb Dictionary Form +
This grammar point is used to describe a situation where a change in one thing occurs simultaneously and in proportion to a change in another thing. It is typically used with verbs that express a process of change or progression.
Verb Dictionary Form
When attached to the dictionary form of a verb, it indicates that as the action or state described by the first verb progresses, the second action or state also changes.
町が便利になる
As the town becomes more convenient, the population increases.
気温が上がる
As the temperature rises, the ice melts.
Noun +
This grammar point can also be used with nouns that inherently imply a process of change or movement over time.
Noun
The noun used must describe a change that happens over time. The second part of the sentence describes the resulting change.
技術の進歩
With the development of technology, life becomes easier.
試合の進行
As the game progresses, the rules become difficult.
Only nouns that represent a continuous process or movement, such as 'development' or 'progress,' can be used in this construction.