My mother promised (me) to buy a dress
译成：我的妈妈答应给（我）买一件连衣裙。

promise to do
承诺做
双语对照
词典结果：
网络释义
1. 许诺做某事
2. 保证...
例句:
1.
But with t搜趣网his luck comes a responsibility: that you promise to do something goodwww.souquanme.com wwww.souquanme.comith it.
但与这份幸运随之而来的还有一份责任：你要承诺用这些钱做//www.souquanme.com些善事。

If everyone will promise to do hiwww.souquanme.coms part, the plan will certainly he a success.
如果每个人都保证尽到自己的责任，计划肯定会成功。
He gave his solemn promise to do better.
他庄重地保证把事情办好。