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1·He warned me not to be late.

他提醒我不要迟到。《牛津词典》

2·He warned us against pickpockets.

他提醒我们要提防小偷。《牛津词典》

3·We warned them, but to no effect.

我们曾告诫过他们，但没起任何作用。《牛津词典》

4·Mrs. Blount warned me not to interfere.

布朗特太太告诫我不要插手。《柯林斯英汉双解大词典》

5·Players were warned twice for foul play.

选手们因违规而两次被警告。《柯林斯英汉双解大词典》

6·The referee warned him for dangerous play.

裁判警告他有危险动作。《牛津词典》

7·He warned Billy to keep away from his daughter.

他警告比利离他女儿远点。《牛津词典》

8·She warned me not to say anything to upset him.

她警告我不要说任何让他心烦的话。《柯林斯英汉双解大词典》

9·'I warned you not to phone me,' he said evenly.

“我告诫过你不要给我打电话。”他平静地说。《牛津词典》

10·Their instincts warned them something was amiss.

他们的直觉警告他们某些地方不对头。《柯林斯英汉双解大词典》

警告

1·Players were warned twice for foul play.

选手们因违规而两次被警告。《柯林斯英汉双解大词典》

2·The referee warned him for dangerous play.

裁判警告他有危险动作。《牛津词典》

3·He warned Billy to keep away from his daughter.

他警告比利离他女儿远点。《牛津词典》

4·She warned me not to say anything to upset him.

她警告我不要说任何让他心烦的话。《柯林斯英汉双解大词典》

5·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》

(1)warn of警告某人某事

(1)warn against警告（...）不要；提醒（...）提防

(1)warn about就...提出警告