The phrase "a vow to keep" is correct and usable in written English.
It can be used when referring to a promise or commitment that one intends to uphold or maintain.
Example: "After much reflection, I made a vow to keep my promises, no matter how difficult it may be."
Alternatives: "a promise to uphold" or "a commitment to maintain".
I made a vow to keep up on the last frenzied page.
Unsurprisingly, one of the foundations of his plan was ripping up "terrible" trade agreements and, especially, a vow to "keep America out of the Trans-Pacific Partnership".
"It's fine," he said, a phrase I've come to understand means "back off". Under normal circumstances, this earring conversation would precipitate a fight, but I had made a vow to keep the college search process light and amicable, and this being our maiden voyage, I was still sweetly committed.
Take a vow to keep working until you both are argument-free.
But they also made a welcome vow to keep fighting for reform, a cause that was awfully lonely seven years ago and has seen its obituary written many times since then.
For someone who spends most of his time watching, writing about and pondering the theater, this (like so many pledges made at the end of a year) is not an easy vow to keep.
"All the women deserve to be treated equal". The R&B star says it was a hard vow to keep but it was worth it.
The incumbent also calls Roem disingenuous because she broke an early vow to keep individual donations to $500 or less — a promise Roem now says was naive in light of what it takes to run a successful campaign.
It felt like the last day of camp, when a group of people who have gone through a rich experience together vow to keep up its momentum, and grow a little sad realizing the likelihood that they will not.
Even if the farm bill does not pass, Mr. Harkin and Senator Lisa Murkowski, Republican of Alaska, a sponsor of the amendment, vow to keep reintroducing it in other forms until it sticks.
