write + as N progresses, so does the other
kaku ni tsurete
as N progresses, so does the other; in proportion to N
年を取るにつれて、疲れやすくなるよね。
toshi o toru ni tsurete, tsukareyasuku naru yo ne.
As you get older, you get tired more easily, don't you. casual
都市の人口の増加につれて、住宅不足も深刻になった。
toshi no jinkou no zouka ni tsurete, juutaku busoku mo shinkoku ni natta.
As the city's population grew, the housing shortage also became serious. neutral