My mother often warns me to get up early

我媽媽經常提醒我早起。

warn sb to do sth 提醒某人做某事。

The teacher always warns her Students to pay attention to traffic accident.

老師總是提醒學生關注交通事故。

warn sb not to do sth.警告某人不要做某事

"But I have to warn you, Snivellus," Burns said louder and louder, incapable of controlling her fury, "I won't let you do this!" 

“可是我不得不警告你，鼻涕精。”博恩斯越說聲越大，她無法控制自己的怒火，“我不會讓你這麼做！

However, before we start measuring it — and I will do ten oscillations to — get a reasonable, accurate result — I want to warn you. 

然而，在我們沒測量潛-，我會做十次擺動，得到一個合理，精確的結果-，我想要警告你們。

WHO wishes to warn the public of these misleading practices that do not originate from WHO, and are not in any way associated with WHO projects or events. 

世衛組織希望提請公眾注意這些誤導手法，它們並非來自世衛組織，與世衛組織專案或活動毫無關聯。

The findings do not mean that slow walkers are doomed to die early, the researchers warn. Nor will intentionally pushing yourself to hustle keep you young. 

研究員稱研究結果並不表明慢速者註定早死，而刻意加快步速無益於保持年輕

Now I am going back to my people, but come, let me warn you of what this people will do to your people in days to come. 

現在我要回本族去，你來，我告訴你這民日後要怎樣待你的民。

I told him, 'Talk to me first before you do anything. I warn you, be very careful.' 

我對他說，‘你做任何事情之前，先和我說一下，我警告你，要小心。’

Often did we warn them not to do so. 

我們曾多次警告他們不要這麼做。