1.as well as 中第一个as 是副词,用在形容词或副词前意思时："同样地".第二个as 是连词,意思时“和、、、一样.但我们应该把该词组当成一个整体去记,其用法大致如下：
1.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.
The child is lively as well as healthy.
这孩子既健康又活泼.
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.
We are repairing the roof as well as painting the walls.
我们在粉刷墙壁同时也在修理屋顶.
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 breaking his leg,he hurt his arm.
他不但摔断了腿,而且还伤了胳膊.
She sings as well as playing the piano.
她不但会弹钢琴,而且会唱歌.
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.
I as well as they am ready to help you.不仅他们愿意帮助你,我也愿意帮助你.
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）
They have invited you as well as I.
他们和我一样都邀请了你.（they和I都作invited的主语）
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：
George,as well as his brother,has gone abroad.
乔治和他兄弟一样都出国了.
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）
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.）
8.注意as well as 有时会引起歧义句.例如：
He can speak french as well as English.
（1）他会说英语,也会说法语.
（2）他说法语能说得像英语一样好.（…as well as he speaks English）
二.
rather than 是一个并列连词,用法比较复杂,现归纳如下：
1.rather than 与would 连用时,构成“would rather...than...”句式,意思是“宁愿……而不愿……”,表示主观愿望,即在两者之中选择其一.例如：
She'd rather die than lose the children.她宁愿死也不愿失去孩子们.
2.rather than 不与would连用时,表示客观事实,意为“是……而不是……；与其……不如……”.它连接的并列成分可以是名词、代词、形容词、介词(短语)、动名词、分句、不定式、动词等.现分述如下：
(1) 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.
You rather than I are going to go camping.是你而不是我要去要野营.
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.
(2) 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.
(3) 连接两个介词(短语)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.
(4) 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.
(5) 连接两个不定式
I decided to write rather than (to) telephone.我决定写信而不打电话.
注意：rather than 后接不定式时,不定式可以带to,也可以不带to,如上句.但rather than位于句首时,则只能接不带to 的不定式.如：Rather than allow the vegetables to go bad,he sold them at half price.他唯恐蔬菜烂掉,把它们以半价卖掉了.
(6) 连接两个动词
He ran rather than walked.他是跑来的,而不是走来的.
注意：这里rather than 后用了walked,而没有用walk,表示客观事实,而不是主观愿望.如果换成walk,则作“宁愿……而不愿 ……”解.