Question

He always goes to school at seven o'cloc为什么要用goes？

He always goes to school at seven o'clock 前面已经有always了,为什么还用g

Answer 1

主语是he
谓语是go，要用三单所以是goes
always是一个状态，总是的意思

Answer 2

第三人称单数表示经常性动作。