goes 因为主语是he,谓语单词要用三单、
如果把 on sunday 改成 now 答案是 is going
如果 把 on sunday改成 next .,可能是 next week,答案是 will go
He didn't do his homework 这里没有具体的时间状语.不一定要用 didn't,doesn't 也可以
不懂追问啊