He usually goes to school by bike还是bys bike?

题目

He usually goes to school by bike还是bys bike?
第三人称后已经用单数了，后面还要第三人称单数吗 ？ 如果是其他的。

答案

by bike, by是介词,不是动词,只有动词才有各种人称格式,介词就像on,at,in等一样,不用变化的