(1).dare作为情态动词,主要用于疑问句,否定句和条件从句中,一般不用于肯定句.(你这道题句子就是否定句)
a.How dare you say I’m unfair
b.He daren’t speak English before such a crowd ,dare she
c.If he dare break the rule ,he will be punished .
(2)dare作实义动词,有时态,人称和数的变化.所不同的是,在肯定句中,dare 后面通常接带to的不定式; 在否定和疑问句中,dare后可接带to或不带to的不定式.
a .I dare to swim across the river
b .He doesn’t dare (to) answer.