〜てやる: meaning and usage

How to form it

• verb (te-form)+やる

How it is used

Doing something for someone younger or lower, an animal or a plant; blunt and casual, used within the family or among close friends. When angry or determined, it means “I'll show you”. In ordinary speech, use 「〜てあげる」.

Examples

1. いいことを教えてやる。

   I'll tell you something good. (e.g. a secret)

2. 毎朝、犬を散歩に連れていってやります。

   Every morning I take the dog for a walk.

3. 弟に自転車の乗り方を教えてやった。

   I taught my little brother how to ride a bike.

4. 下手だと笑われたけど、いつか絶対に上手になってやる。

   They laughed at me for being bad at it, but one day I'll be good — just watch.