A: Is Tom smarter than Sam?
B: No, he isn't. Sam is smarter than Tom.A: Is Tom taller than Sam?
B: Yes, he is.He is taller than Sam.A: Does Tom get up earlier than Sam?
B:No, he doesn't. Sam gets up as early as Tom.

1.as ... as的用法
1)我和内莉一样高。I am as tall as Nelly.
2)汤姆和萨姆跑的一样快。Tom runs as fast as Sam.3)莉莉不如露茜外向。Lily is less outgoing than Lucy.
as ... as 的含义为“和……一样”,用于形容词、副词的同级比较。两个as的词性和用法不一样,第一个as是副词，后面接形容词或副词的原级，第二个 as 多为连词。as ... .s的否定形式为not as/so+
adj./adv.+ as，表示“不如.……”,其中，第一个as可以用副词so替换,但第二个as 则不能。