使役形（〜させる）
Causative — making or letting someone do somethingmachine translation
FormationGroup I: う-row → あ-row + せる; group II: drop る + させる; する → させる、来る → 来させる
The causative expresses making or allowing someone to do something: 食べさせる can mean either "make (someone) eat" or "let (someone) eat" — context decides. The person ordering or permitting is always in the higher position: parent–child, teacher–student, boss–subordinate.
Conjugation: group I changes the final sound from the う-row to the あ-row and adds せる: 読む → 読ませる, 書く → 書かせる; verbs ending in う change it to わ: 買う → 買わせる. Group II drops る and adds させる: 食べる → 食べさせる, 見る → 見させる. Group III: する → させる, 来る → 来させる (こさせる). The result always conjugates further as a group II verb.
The particle for the person being made to act depends on the verb: with a transitive verb, that person takes に because を is reserved for the direct object (弟に野菜を食べさせる); with an intransitive verb, the person takes を (学生を家に帰らせる — let the students go home).
To ask permission humbly, combine the causative with 〜てください into 〜させてください ("please let me…") — covered in the next lesson.
Examples
母は弟に野菜を食べさせました。
My mother made my younger brother eat vegetables.
先生は学生を家に帰らせました。
The teacher let the students go home.
父は兄に車を運転させました。
My father let my older brother drive the car.