1.含义不同:
【beside】prep.“在旁边;与…相比;和…无关”
eg:On the table beside an empty plate was a pile of books.
桌上的空碟子旁摆着一摞书。
【besides】adv. prep. “此外;而且;除…之外”
eg:Besides these honors he received a sum of money.
除了荣誉以外, 他还得了一笔钱。
2.用法不同:
【beside】一般是位置词,用来表示位置和方向.
eg:We both looked down at the newspaper beside him.
我们都望向他旁边放着的那张报纸。
【besides】一般做介词使用。
eg:I think she has many good qualities besides being very beautiful.
我觉得她除了非常漂亮之外,还有许多好的品质。
[beside]例句:
1.Her remarks were beside the question.
她的话与这问题不相干。
2.Tourist: Then whose is that small one beside it?
游览者:那么旁边的小头盖骨是谁的呢?
3.When he learned of the good news, he was beside himself with joy.
听到那个好消息时, 他按捺不住高兴的心情。
[besides]例句:
1.Besides, I have lots of other friends.
而且,我还有很多其他的朋友。
2.He gave me a book, a pen and some money besides.
他给了我一本书,一支钢笔,此外还给了我一些钱。
3.Besides, he is only a baby.
此外,他只是一只小家伙。
参考资料:百度百科-besides