122.warn v.提醒，警告

122.warn v.提醒，警告
warn somebody （not） to do something
警告／告诫某人（不要）做某事
My Mom often warns me not to talk with strangers .
The manager has warned you to be there on time.

warn somebody of ／about something
提醒某人注意某事
The news warned us about the storm， so we should turn off all electric machines at home.
The government has warned us of the serious situation.

warn somebody against（ doing） something
提醒某人当心／提防（做）某事
We should warn people against swimming in that deep river.It is very dangerous to do that.