1.误：She forbids her children eating sugar because she doesn’t want their teeth to be ruined.
正：She forbids her children to eat (from eating)sugar because she doesn’t want their teeth to be ruined.
正：She forbids her children sugar because she doesn’t want their teeth to be ruined.
析：forbid(禁止)不能接现在分词作宾补，只能接现在分词作宾语，其句型是forbid doing sth;表示“禁止某人（做）某事”有下面几个句型：1）forbid sb to do sth;2)forbid sb from doing sth;3)forbid sb sth.
