に驚いた

was surprised by

→ に
phrase Common #5,435
was surprised by Used after the thing that caused someone to feel surprised or amazed.
JA: ケイトは彼の振る舞いに驚いた。
EN: Kate was surprised by his behavior.

ケイトは彼の振る舞いに驚いた。

Kate was surprised by his behavior.

私はジョンの死に驚いた。

I was shocked by John's death.

彼らはその市の急速な発展に驚いた。

They were amazed by the city's rapid development.

私は彼の辞任に驚いた。

I was surprised by his resignation.

私たちはみな彼の死の知らせに驚いた。

We were all shocked by the news of his death.

私はそのゴルファーの腕前に驚いた。

I was amazed by that golfer's skill.

私は彼の無礼さに驚いた。

I was surprised by his rudeness.

彼女の突然の訪問に驚いた。

I was surprised by her sudden visit.

コンサートに行った人々は彼の演奏に驚いた。

The people who went to the concert were amazed by his performance.

トムはマリーの発言に驚いた。

Tom was surprised by what Marie said.

その料理人は彼の信じられないほどの食欲に驚いた。

The chef was amazed by his incredible appetite.

我々は彼の行為に驚いた。

We were surprised by his actions.