warns

[wɔ:n]

[ warns ]

vt.警告, 告诫, 预先通知
vi.发出警告

例句与用法：

He warned us against pickpockets.

他告诉我们要小心扒手。

I warned them that there might be snakes in the woods.

我提醒他们树林里可能有蛇。

He warned me against going there at night.

他警告我晚上不要到那去。

词形变化：