英和辞典
  
happen中A1
hǽpnハプン
動詞
❶起こる, 生じる
Accidents often happen here.
Accidents often happen here.
ここではよく事故が起こる.
What happened (to her)?
What happened (to her)?
(彼女に)何が起こったんだ[(彼女は)どうしたんだ].
Has anything happened?
Has anything happened?
何か起こったのですか. have助動❶
❷happen to do で偶然ぐうぜん~する, たまたま~する
I happened to meet him.
I happened to meet him.
私は偶然彼に会った.
My parents happened to be away.
My parents happened to be away.
私の両親はたまたま留守だった.
It so happens that ~.It happens that ~.It (so) happens that ~.
It (so) happens that ~.
偶然~である  ⦣ It は漠然ばくぜんと「状況じょうきょう」を表す.
It (so) happened that my parents were away.
It (so) happened that my parents were away.
私の両親はたまたま留守だった.