英语句子翻译(初中)

The old man warned those children not to skate on the thin ice.
考点是：warn sb. not to do sth.(告诫某人别做某事），not to do 是不定式的否定型式。

前面两个都很好，只是忽略了“这么”
The old man warned those children not to skate on such thin ice.

that old man warned these children of not skating on the thin ice