be warned to do 还是 doing 请举例说明！
be warned to do
e.g. Children must be warned to stay away from main roads
标签：warned,do,doing
版权声明：文章由 酷百书 整理收集，来源于互联网或者用户投稿，如有侵权，请联系我们，我们会立即处理。如转载请保留本文链接：https://www.kubaishu.com/answer/143433.html
be warned to do 还是 doing 请举例说明！
be warned to do
e.g. Children must be warned to stay away from main roads
标签：warned,do,doing
