how to use "dare"?

dare: [ dεə ]

n. 挑战,挑动
v. 敢,胆敢
名词:darer 动词过去式:dared 过去分词:dared 现在分词:daring 第三人称单数:dares

例如:
1. How dare you say such a thing?
你怎敢说出这样的话？

2. I dare say you are right.
我认为你是对的。

3. He dared me to jump over the river.
他激我跳过河。

4. Nobody dared lift their eyes from the ground.
没有人敢把视线离开地面。

5. I ,dare say you are British but you still need a passport to prove it.
我相信你是英国人, 但仍需有护照加以证明.