てやる
(Te yaru)
To do something for a subordinate, a child, or an animal.
Connection rules
- +Verb (te-form) + やる
- +Expresses a casual or downward direction of favor
Examples
1.
弟に新しいおもちゃを買ってやった。

Otouto ni atarashii omocha wo ka te ya ta.
I bought a new toy for my younger brother.
「Gifting a sibling」
2.
猫のために暖かい家を作ってやるつもりだ。

Neko no tame ni atatakai ie wo tsuku te yaru tsumori da.
I plan to make a warm house for the cat.
「Diy for a pet」
Practice
I read a picture book to my son before he went to sleep.
寝る前に、息子に絵本を___。
Romaji also accepted