Preposition: at

• time: Be vigilant at all times to protect young people from risk.

Modifies a noun

• eye: On open ground, I would keep a vigilant eye on my defenses.

• watch: Hatteras and Johnson were informed how matters stood, and it was resolved to maintain a vigilant watch.

Modifying Another Word

• especially: Be especially vigilant with any horse that has a history of colic.

• particularly: Those with HIV are advised to be particularly vigilant.

• constantly: Principle #3: The defender must be constantly vigilant; the attacker can strike at will.

• ever: Well, we must be ever vigilant to retain what we have gained.

• extremely: Workers must be extremely vigilant of the aim of the new government to compromise their struggles.

• very: All staff need to be very vigilant about bogus calls.

Infinitive complement

• ensure: Trustees should be vigilant to ensure they remain informed of any specific requirements.

• prevent: An alpha wolf will have to be vigilant to prevent a stranger from mating with his or her partner.

• protect: Given unlimited powers by his citizens, he was ever vigilant to protect their rights.

Used with adjective complement

• remain: The undead demons have a great power to corrupt, for which the hunter must at all times remain vigilant.

• stay: The Best Defense for Your Credit Security: Stay vigilant.

• become: Conclusion The Commission is becoming increasingly vigilant in applying the EC state aid rules.

• keep: This experience is typical of observing nature in the wild, you have to keep vigilant at all times even behind you!

Preposition: in

• face: We should, therefore, be encouraged and remain ever more vigilant in the face of discrimination and persecution!

• order: In turn, however, shopkeepers must recognize the need to be vigilant in order to prevent sales to the underage.

• place: There is a high threat from global terrorism in Kenya and visitors should be vigilant in public places and tourist sites.

Preposition: for

• sign: If you keep poultry or domestic birds please remain vigilant for signs of the disease.