这题牵涉到非谓,AC不敢确定,我觉得都可以.因为dare做主动词的时候,后加不定式可带to也可不带to.亲爱的好人，你能给我讲解一下这道题吗？关于非谓语和dare的用法这两点Seeing that his father was in a gray mood, the little boy主语 sat 谓语quietly, not ____ tell him his failure in the exam. 首先要找到一个句子的主语和谓语。另外在看这个句子有没有连词，比如and ，but。该句没有。Seeing that his father was in a gray mood, =because he saw that his father was in a grey mood,非谓语就是没有主动词，该句的because he 都可以省略，而省略后，saw就要改成seeing。后面这半句，仍然我们找不到连词，所以要用非谓，用daring to。我现在觉得应该选这个而不是daring。做实义动词用。dare做情态动词的时候过去式形式dared。没有daring的形式。常用于否定句，疑问句。做实义动词的时候，也常用于否定句和疑问句，后加不定式可带to也可不带to。 she didn't dare (to) say anything about it.