1、dare do 用作情态动词，后跟动词原形，主要用于疑问句、否定句和条件句中。
2、dare to do用作实义动词，此时其后的动词不定式可带to也可不带to，且dare有人称和数以及时态的变化。
拓展资料
dare do
1、Few companies dare do this for fear of being sued for discrimination.
很少有公司敢这么做，因为它们担心自己因歧视而遭到起诉。
2、Jacque always said to me," I don't dare do anything anymore,'cause I'm afraid it's not allowed. "
雅克经常跟我说：“我什么都不敢做了，因为怕违反了禁令。”
3、When a man is drunk, he often forgets himself and does and says things that he wouldn't dare do as usually.
当一个人喝酒时，他经常忘乎所以，做出或说出他平常不敢做的事。
4、I'll fire you if you dare to do so.
你胆敢这么做，我就开除你。
5、How dare you do this without talking to me?
你怎么胆敢没和我说就这么干？
6、She dare not do anything to me, I have her number.
她不敢对我怎么样的，因为我对她的底细一清二楚。
dare to do
1、We just have to dare to do it.
我们只需要勇于卓越。
2、Would someone dare to do that?
真的有人如此大胆？
3、I really admire her courage, because such things are always done by men and few women I know dare to do so.
我真的很佩服她的勇气，因为这类事情总是男人来做的，我认识的女性朋友很少胆敢做这些事。
4、But we must be good at throwing away the rock which presses us, and dare to do so.
这世界上有很多压我们的石头，要敢于掀开石头。还要善于掀开石头。
5、Had an insane two-nights-in-a-row last weekend? Dare to do it again?
上周末两夜的“联盟”狂欢，还敢再来一次吗？
6、Dare to do what dreamers do.
勇敢地如有梦想的人般向前。