Grammar
N2 connective

As ~ progresses 〜につれて

Meaning

"As ~ progresses, …" — two things changing gradually in step.

Formation

Notes

Both sides must be gradual and continuous, and neither may be a single event or a deliberate act. The main clause cannot be a command, request or invitation — ✗ 春になるにつれて花を見に行きましょう.

Examples

As I climbed the mountain, the air grew colder.

Breakdown
mountain climb as ~ progresses air became cold

As time passed, the pain eased.

Breakdown
time pass / elapse as pain eased

As the economy grew, the urban population increased.

Breakdown
economy growth as city population increased

As I built up practice, my pronunciation improved.

Breakdown
practice pile up / repeat as pronunciation has got better

As the days grow shorter, the mornings get cold.

Breakdown
daytime become short as morning get cold

⚠️ Often confused with

Together with / as 〜とともに

"Together with ~"; also "as ~ changes, so does …".

In accordance with 〜に従って

"In accordance with ~"; also "as ~ progresses".

Accompanying 〜に伴って

"Accompanying ~", "as a consequence of ~" — formal parallel change.