详解as well as

       as well as结构在英语中很常见，它的具体用法如下：
　　1.意为“和……一样（好）”，这时，第一个as是副词，第二个as是连词，表示同级的比较。如：
　　The mind needs exercise as well as the body.
　　大脑同身体一样需要锻炼。
　　You study as well as Tom. 
　　你和汤姆学习一样好。
　　2.连接两个并列的同等成分，意为“不但……而且……”，“既……又……”，相当于“not only... but also...”。它所连接的部分既可以是单词、短语，也可以是句子。如：
　　The girl is lively as well as healthy.
　　这个女孩既健康又活泼。
　　They sell books as well as newspapers.
　　他们既卖报纸，也卖书。
　　I have to feed the animals as well as look after the children.
　　我不但要照顾孩子们，而且还要喂那些动物。
　　3. 在使用as well as 时还应注意以下几点：
　　（1）连接主语时，其谓语动词的人称和数应与放在as well as 之前的名词或代词保持一致。如：
　　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。
　　（2）连接两个谓语动词时，前后时态一般应保持一致。如：
　　He publishes as well as prints his own book.
　　他的书是他自己印刷出版的。
      They are repairing the roof, as well as painting the walls. 
　　他们既修房顶，又油漆墙壁。
　　（3）用于否定结构中，not 位于as well as 后时，两者都否定；not用于as well as 前时，否定前者，肯定后者。如：
　　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。