授受表現N4
くれる／くださる
to give (to me) / to give (humbly, from a superior)
Structure
N + を + くれる / くださる（動作主：が）
Explanation
くれる means someone gives something to the speaker (or in-group), with the giver marked by が. くださる is the respectful form used when a superior gives (e.g., 友達が本をくれた; 先生が本をくださった).
Examples
友達が旅行のお土産をくれました。
My friend gave me a souvenir from his trip.
先生が辞書をくださいました。
The teacher gave me a dictionary.
Note
The giver of くれる is always someone else. It is the reverse of あげる (I give / someone gives me). Note くださる conjugates specially (くださいます).