by accident

by accident偶然，意外地

【用法】“by+抽象名词”相当于某个副词。如：by mistake=mistakenly，by nature=naturally。

【例句】

◆Mr．Brown found his lost money by accident．布朗先生意外地找到了他丢失的钱。

◆ As a matter of fact, I landed in Britain by accident. 事实上，我在英国上岸是偶然的。（人教版，必修③，Unit 3）

【联想】同义短语：by chance