发现的过去式英文怎么说

"Discover" 的过去式是 "discovered"。

关于 "discover" 的词源，它来自拉丁语 "discoperire"，意思是 "uncover, reveal, find out"。这个词在英语中最早被记录是在1400年左右。

例句1:
He discovered America in 1492.
(他在1492年发现了美洲。)

例句2:
She discovered that she had left her keys at home.
(她发现她把钥匙留在了家里。)

例句3:
I discovered a new restaurant downtown.
(我发现了一家市中心的新餐馆。)