They warned him of the dangers of sailing alone.

他们警告他独自航行的重重危险。

《柯林斯英汉双解大词典》

They warned the group to turn around.

他们向人群发出警告让我们回去。

youdao

They warned me that the relationship would never work out.

他们警告我说我们的感情不会有结果。

youdao

They warned of serious damage to the American form of government if the president was removed for political reasons.

VOA: special.2010.01.28

But there's one other complication that you've got to be warned about, which is this. Because these are dialogues and they take the form of philosophical arguments, people put forward views and then, over the course of the discussion, change their minds about things.

但是,还有一个地方,我要提醒你们,那就是,由于这些是对话作品,且它们全都采用了哲学论证的形式,即,人们先提出观点,然后,在讨论的过程中,改变自己的关于事物想法

耶鲁公开课 - 死亡课程节选

They warned that Horatio Seymour and the Democrats were all secret rebels in their hearts.

VOA: special.2010.02.11

The only companies with a prayer of going public, they warned, were those that could show profits.

FORBES: Survivor

And they warned they could shut the waterway again if water levels rise to 62.5 feet.

CNN: STORY HIGHLIGHTS

Police said they warned a number of motorists who photographed the scene as they drove past.

BBC: A14 crash: One dead and five injured at Cambridge