用“promise to do”造一个英语句子

用“promise to do”造一个英语句子

If everyone will promise to do his 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。

I promise to my mother

I promise you that we will go nowhere but Beijing.追答精锐五角场

I promise to be your side
我誓守你身边

I promise to help you with your English.

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