They usually went to school by bus yesterday .
They usually took a bus to school yesterday.
They usually took a bus to go to school yesterday.
They usually went to school by taking a bus yesterday.
其实这句话中的usually 和后面的时间状语yesterday有些别扭.They usually took a bus to go to school yesterday.请问to和school中间加入goto怎么理解？谢谢！took a bus
乘公车
go to school 去上学

took 和 go 都是实意动词，中间加to，
连起来就是 took a bus to go to school
乘公车去上学