The "vigilant" police officer noticed the robber sneaking into the jewelry store.
We must remain vigilant in case they return.I have never been so vigilant in my life before tonight.
Being vigilant contributes to crime prevention.
If you are always vigilant, you will be safe. One must remain vigilant.
The army remained vigilant for signs of an enemy attack.The prison warden was so vigilant that it was said he had already caught fifteen criminals trying to escape.
1.Yes their there are sentences using vigilant for example their are driver that are vigilant for their car and car key next their are animal that are vigilant like bear rattle shake tiger lion. Human are VIGILANT ABOT THEIR CHILDREN. if you want to use vigilant in a sentence us one of the example up their, i will give 2 example of vigilant sentences 1. Drivers are vigilant about their cars 2 rattler snake are vigilant about their predator or prey.
The bear was very vigilant in watching over her cubs. or The school was vigilant and strict about their rules.
The captain warned the lookouts to be extra vigilant as a radio signal warned of possible enemy ships ahead.
The officer's vigilance prevented a crime.
We must be vigilant in case the enemy comes back.They were vigilant all night long.
Sure, I can use "so" at the beginning of a sentence.
Vigil is a set lookout. Usually it is a solitary activity, similar to a watchman who looks out over the town for a set time."Roxanne settled down for her vigil over the sick baby."
So- you are asking when to use 'when' in a sentence. When you are asking how to use when in a question, you are already using when in a sentence, because a question actually is a sentence. I like to use when in a sentence whenever I like.