by 词性（by的用法记忆顺口溜）

介词，副词。

by

英 [baɪ] 美 [baɪ]

prep.在…旁边; 表示方式; 由于; 经过;

adv.经过; 表示保留或保存时用; 短暂拜访;

[例句]The feast was served by his mother and sisters.

这顿美餐是他母亲和他的姐妹们准备的。