dare do sth是表示现在的状态;dare to do sth是表达一种未来的状态,想做还没做的意思。
Do you dare to go outside when there is a storm?
暴风雨时候,你敢出门吗?She doesn't dare to swim in that pool.
她不敢去那个湖里游泳。
Dare you fight with the robber?
你敢和强盗打架吗?
I dare not sit on the top of the ferry wheel.
我不敢坐在摩天轮顶上。