2つの文をつなぐ接続詞の働きと代名詞の働きを兼ねたものを関係代名詞と言う 前の名詞（先行詞）を修飾する 先行詞が人なら，whom か that 先行詞がモノや動物なら，which か that 関係代名詞の後の動詞は先行詞や時に合わせて変化させる Ken is a boy. I likes him. Ken is a boy whom I like. 健は少年だ，彼を私は好きだ。

彼女は私が昨日会った子です。（答えは一つとはかぎらない）

• A. She is the girl whom I met yesterday.
• B. She is the girl who I met yesterday.
• C. She is the girl I met yesterday.

こちらはあなたが公園で見た男性です。

• Is he the person whom you called last night?
• This is the man whom you saw at the park.
• I don't know the boy whom she likes.

彼は昨夜あなたが電話した人ですか？

• Is he the person whom you called last night?
• This is the man whom you saw at the park.
• I don't know the boy whom she likes.