in addition to 因为以介词结尾，所以作用相当于一个介词，意思是除...之外，；除…之外又，加上……
in addition 以名词结尾，作为相当于副词adv.，意思也；另外，加之
in addition 此外，另外，还有。如：
In addition, they do not match very much.
除此之外，他们两人并不十分般配。
We met some friends and other people in addition.
我们遇见几位朋友，还遇见其他一些人
in addition to 除……之外。如：
We play football in addition to basketball.
除了篮球外，我们还踢足球。
In addition to English, he has to study a second foreign language.
除英语外，他还得学第二外语。
In addition to an album, I gave him a pen and a pencil.
除了一本照相簿外，我还给了他一支钢笔和一支铅笔。巴士英语www.xiao84.com
In addition to a diet, she pursues various exercises on TV.
节食以外她还随电视做体操。
其中的to为介词，所以后接动词作宾语时要用动名词。如：
In addition to giving a general introduction to computers, the course also provides practical experience.
课程除了大致介绍电脑知识外，还提供实际操作的机会。
当主语后跟有in addition to引出的介词短语时，谓语动词仍与其前的主语保持一致。如：
The teacher, in addition to his students, was interested in the book.
老师和他的学生都对这本书感兴趣。
