N4 Compound Verbs and Change
~ていく/〜てくる: meaning, usage and examples
~ていく/〜てくる means: change over time (away from / toward the present).
How to form it
<Verb て-form> + いく / <Verb て-form> + くる
Examples
あの歌手の人気は、これからもっと上がっていくだろう。
That singer's popularity will keep rising.
だんだん寒くなってきましたね。
It has gradually gotten colder, hasn't it?
日本語の勉強が楽しくなってきました。
Studying Japanese has been getting more fun.
この町の子どもの数は、これから減っていくでしょう。
The number of children in this town will probably keep going down.
When to use it
With verbs of change like なる, 増える, or 変わる, てくる shows a change that has been happening up to now: 寒くなってきた (it has been getting colder). ていく shows a change that will continue from now into the future: これから人が増えていく (more and more people will come). Think of the present moment as the center point.
Nuance
Very common in casual and polite speech. てくる often expresses a change you have just noticed: 雨が降ってきた (it has started raining), おなかがすいてきた. ていく often sounds like a prediction, so it pairs with これから, もっと, and だんだん. いく and くる are written in hiragana here.
Compare
Change over time vs movement (~てくる for errands): 本を買ってくる means "go buy a book and come back"; someone moves. 暑くなってきた has no movement; it means "it has gotten hotter." If nobody goes anywhere, it is about time. ていく vs てくる: 増えてきた looks back up to now; 増えていく looks forward.
Tip: Picture a timeline: てくる arrives at now from the past, and ていく leaves now for the future. だんだん works with both.
Related points
Similar meaning, often confused
More in Compound Verbs and Change
Frequently asked questions
What does ~ていく/〜てくる mean?
Change over time (away from / toward the present). Example: あの歌手の人気は、これからもっと上がっていくだろう。 (That singer's popularity will keep rising.)
How do you form ~ていく/〜てくる?
<Verb て-form> + いく / <Verb て-form> + くる. Picture a timeline: てくる arrives at now from the past, and ていく leaves now for the future. だんだん works with both.