よく調べた

thoroughly investigated

→ 良く
phrase Rare #26,300
thoroughly investigated A past-tense phrase meaning that someone carefully checked, examined, or researched something. よく means “well” or “thoroughly,” and 調べた is the past form of 調べる.
JA: 旅行の前にホテルをよく調べた。
EN: I thoroughly researched the hotel before the trip.

あなたの申し出よく調べた上でご返事しましょう

I’ll carefully consider your offer before giving you my answer.

その家を買う前によく調べた方がいいですよ

You should do your research before buying that house.

彼はその家を買うかどうか決める前によく調べた

He did his research before deciding whether to buy the house.

報告書をよく調べた

I examined the report carefully.

よく調べたわね

You really did your homework.

— エリート・スクワッド (2007)

私は契約書よく調べた

I carefully reviewed the contract.