と申し出た

offered to

→ と
phrase Rare #42,374
offered to The と marks what someone offered to do or provide.
JA: 彼は荷物を運ぶと申し出た。
EN: He offered to carry the luggage.

何人かには、船に乗せて故郷まで帰してあげると申し出た。

I offered to put some of them on a ship and send them home.

ほどなく、ほかの読師の大半が私の隣に座ると申し出た。

Before long, most of the other readers offered to sit next to me.

ジェインは私たちが留守のとき子供たちの世話をしてくれると申し出た。

Jane offered to look after the children while we were away.