The phrase 'ensure to keep' is correct and commonly used in written English.
You may use it when you wish to emphasize the importance or certainty of an action. For example: I will ensure to keep the secret from everyone.
Tami McVay is a leading Lifestyle Expert who has reinvented herself time and again to ensure to keep things interesting, even if that means going against the status quo.
We tried to ensure to keep the sample as comprehensive as possible by only excluding patients on the grounds of not having a diagnosis of breast cancer.
Please ensure to keep it simple, fun and so comfortable that you should not feel it as awkward.
Ensure to keep your own hygiene routine in place every day.
Ensure to keep all terms & conditions very clear right from the very beginning so that there is no confusion neither on your side nor on that of the supplier at the time of delivery.
Thus, hazards could be avoided whilst ensuring to keep the benefit of disinfectants.
To decrease risks whilst ensuring to keep the benefit of the use of disinfectants, it might be worth to consider more strict rules concerning appropriate uses of disinfectants in advertisements.
Be creative when creating the ears, ensuring to keep the ears looking like those of the animal in question.
Further interventions should consider involvement of "more established members of communities" or should ensure incentives to keep young people within their communities.
All identifying information was ensured to be kept confidential and informed consent was obtained from each of the participants.
If this project is expanded, care must be taken to ensure enough staff to keep the quality of oversight high.
