XX以前的样子不像现在这样老于世故。XX以前不是像现在这样老于世故的人。than是将前后2个有可比性的事物，或者事物的不同方面进行比较。前后事物必须有对等、可比性。加what前后比较的就是XX过去与现在的样子，不加what比较的就是过去的这个人和现在的他，个人觉得is应该改成was。what引导的是主语从句、宾语从句或表语从句，并且在从句中充当主语或宾语。如：
I like what she likes.（what引导宾语从句，what在从句中作宾语）
I hate what she hates. （what引导宾语从句，what在从句中作宾语）
What she said made us surprised.（what引导主语从句，what在从句中作宾语）
Tell me what made you do that.、动名词、分句、不定式、动词等。
现分述如下：
连接两个名词或代词
He is an explorer rather than a sailor. 与其说他是一个海员，不如说他是一个探险者。
注意：rather than 连接两个名词或代词作主语时，谓语动词应与rather than 前面的名词或代词在人称和数上保持一致。
连接两个形容词
The sweater she bought was beautiful rather than cheap. 与其说她买的这件羊毛衫便宜不如说它漂亮。
连接两个介词或动名词
We will have the meeting in the classroom rather than in the great hall. 我们是在教室里开会，不是在大厅里。
She enjoys singing rather than dancing. 她喜欢唱歌，而不喜欢跳舞。
连接两个分句
We should help him rather than he should help us. 是我们应该帮助他而不是他应该帮助我们。
连接两个不定式
I decided to write rather than telephone. 我决定写信而不打电话。
than后面什么时候要跟从句,than在比较结构里的用法我知道，但如何判断后面一定要跟从句，跟词性有关吗？
than本来就是比较状语从句的引导词，只不过在长期的使用中，省略已成了习惯。than I还是than me，其实都可以的。
He is taller than I am tall. 这就是本来的结构，由于I之后相同，所以省略了。
My book is more expensive than your book .
My book is more expensive than yours.
You look more like your father than like your mother.
more than 后面有加动词的用法吗
本答案来自北京四中网校：网页链接
morethan与动词连用，对动词起着加强语气的作用。例如：
（1）Repeatedadvertisingwillmorethanincreaseproductsales.多次做广告意味着增加产品的销售。
（2）HisprogressinEnglishlearningmorethanencouragedhimtolearnthesubjectwell.在英语学习方面的进步激励他学好这门课程。
better than意思？为什么有时后面接一个 to，这是什么用法？要是不接to怎么用。
better than：比…更好，better是good的比较级，比较级后加than，表示比…更…，比如I am better than you.我比你更好，后面貌似不能用to
as well as的用法，后面加完整的句子吗
一、as well as后面不能跟完整的句子。
as well as 可连接并列的单词或短语。
例如：It is unpleasant in summer as well as in winter.夏天不好过，冬天也不好过。
2. as well as 连接两个谓语动词时，它们的时态应保持一致。
例如：He publishes as well as prints his own books.他的书是他自己印刷出版的。
as well as 与动词连用时，其后可用V-ing形式，尤其as well as 位于句首时，此时相当于in addition to。
例如：As well as breaki
3. 如果as well as 前面是动词不定式，那么其后的动词也是不定式，但to要省略。
例如：You cannot expect her to do the housework as well as look after the children.你不可能叫她既照顾孩子又做家务。
4. 由as well as 连接的复合主语并不影响谓语动词的数。
例如：Helen as well as I is eager to see the performance.海伦和我一样急于要看演出。
5. as well as 连接的人称代词既可以是主格也可以是宾格，但句意不同。
例如：They have invited you as well as me.他们邀请了我，也邀请了你。（you和me都作invited的宾语）
6. as well as 用于肯定结构和否定结构中，其意义不同。as well as 和not搭配使用，as well as 位于not前时，两者均否定；位于not后时，否定前者，肯定后者。
例如： （1）、George, as well as his brother, has gone abroad.乔治和他兄弟一样都出国了。
（2）、George hasn”t gone abroad as well as his brother.乔治并没有和他兄弟一样出国去。（他兄弟一人出国）
（3）、George, as well as his brother, hasn”t gone abroad.乔治和他兄弟都没有出国。
7. as well as 在意义上通常强调前者，而not only …but also在意义上则强调后者。
例如：He”s got a car as well as a motorbike.他不但有一辆摩托车，而且有一辆小汽车。
（= He”s got not only a motorbike but also a car. ）
拓展资料：
as well as,as well
这一对短语仅差一字之微,意义相近,故很易引起混淆.
作为习语用作介词时,as well as的涵义是“还有”、“不但…而且…”.值得注意的是,在A as well as B的结构里,语意的重点在 A,不在 B.因此,“He can speak Spanish as well as English．”的译文应该是：“他不但会说英语,而且会讲西班牙语”,决不能译作：“他不但会说西班牙语,而且会讲英语”.
如果这样翻译,就是本末倒置了.as well as和 not only… but also…同义,但前者的语意重点和后者的语意重点恰好颠倒.
如果 as well as用作连词引出比较从句,其义为“和…一样好”.因此,“He speaks Spanish as well as English．”应译作：“他说西班牙语像说英语一样好”.语意的重点依旧在前部,不在后半部.
请注意 as well as以下的用法：
She called on you as well as I． 不但我来看你,她也拜访了你.
She called on you as well as me． 她不但拜访了我,也拜访了你.
在下列句中,as well as表示“像…一样”的涵义：
She as well as you is an English teacher． 她像你一样也是英文教师.
这里的谓语动词用is,不用are,因为句中的主语是she,不是she和you.
As well是副词短语,其义为“也”,相当于too,它一般放在句末,有时和连词and或but搭配使用.例：
He is a worker,and a poet as well． 他是工人,但也是诗人.
China possesses enormous quantities of coal and is rich in other minerals as well．
中国拥有大量煤炭,其他的矿藏也很丰富.
Mr．Liu can speak English,but he can speak Cantonese as well．刘先生会说英语,但他也能讲广东话.