英语语法问题在线求助 急

as…as 中的第一个as是副词，修饰形容词young ；第二个as是连词，引起一个比较状语从句she was ten years ago 。
than是介词或连词。
conj (used after a comparative adj or adv to introduce a clause or phrase in which a comparison is expressed 用于形容词或副词的比较级之後, 引导表示比较关系的从句或短语)
*He's never more annoying than when he's trying to help. 他要是想帮忙就更让人讨厌他.
* She's a better player than (she was) last year. 她演得比去年好.
* He loves me more than you do. 他比你更爱我.
* She should know better than to poke the animal with her umbrella. 她应当知道不该用伞去捅动物.

prep
1 (used before a n or pron to express a comparison 用于名词或代词前表示比较关系)
*You gave me less than him, ie less than you gave him or (infml) less than he gave me. 你给我的比给他的少（在口语中
*你给我的比他给的少）.
* I'm older than her. 我比她年岁大.
* Nobody understands the situation betterthan you. 谁也不如你了解情况.
* There was more whiskyin it than soda. 那里面的威士忌比苏打水多.
2 (used after more or less and before an expression of time, distance, etc to indicate how long sth takes, how far it is, etc 用于more或less之後和表示时间、距离等的词语之前, 表明做某事所用的时间、与某物的距离等)
*It cost me more than 100. 这个花了我100多英镑.
* It never takes more than an hour. 所用的时间从不超过一小时.
* He can't be more than fifteen. 他不超过十五岁.
* It's less than a mile to the beach. 离海滨不到一英里.

as...as相当于连词，than是连词，因为ny实际上是ny is的省略

as....as 补足语
than是介词