How to Use "Warn" with Example Sentences

warn (v): to tell someone about a danger or a bad thing that might happen

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Used with adverbs:

"She constantly warns her children not to touch the stove."
(constantly, repeatedly, always)

"The cigarette label clearly warns about the dangers of smoking."
(clearly, firmly, specifically)

"They were publicly warned about the hurricane."
(publicly)

Used with verbs:

"I must warn you that the boss is in a bad mood."
(must, should, have to)

"We tried to warn everyone about the storm."
(tried, attempted)

"He failed to warn the others about the fire."
(failed)

Used with prepositions:

"We were warned about the sharks at the beach."
(about, of)

"We were not warned against going into the lake."
(against)