undertake的过去式和其他时态：
过去式: undertook
过去分词: undertaken
现在分词: undertaking
undertake的用法：
undertake的用法1：undertake的意思是“担任,承揽”,指将某事揽入自己的职权范围内或就任某一职务。undertake还可指“开始着手进行某件事”。
undertake的用法2：undertake多用作及物动词,后接名词、动词不定式或that从句作宾语。可用于被动结构。
undertake的用法3：undertake的过去式是undertook,过去分词是undertaken。
undertake的过去式例句：
1. She was secretly vetted before she ever undertook any work for me.
她在为我工作以前曾受到过秘密考查。
2. He undertook to edit the text himself.
他答应亲自编辑正文的内容。
3. The lawyer undertook the case.
该律师承办这个案子.
4. He undertook the leadership of the team.
他担任了这个团队的领导.
5. Next he undertook to pay off the debts.
然后,他负责偿还债务.
6. She undertook to revise my compositions.
她着手批改我的作文.
7. He undertook to be here at five.
他答应五点钟到这里来.
8. The lawyer undertook the case without a fee.
这律师免费承办那个案件.
9. Peter Cooke undertook to send each of us a sample contract for perusal.
彼得·库克答应给我们每人寄送一份合同样本供阅读。
