过去式和过去分词
undertake
Undertake 是不规则动词：过去式是 undertook，过去分词是 undertaken。
- 原形
- undertake
- 过去式
- undertook
- 过去分词
- undertaken
- 中文释义
- 承担、从事
- 英文释义
- Commit oneself to and begin (an enterprise or responsibility); take on.
- 例句
- “A firm of builders undertook the construction work.”
- CEFR 等级
- C1CEFR 等级从 A1（入门）到 C2（精通）。
- 变化规律
- 三种形式都不同，例如 begin、began、begun。