这题英语修改病句该怎么该呢？

　　In the after(afternoon), I go(went) to cram school,(.) about(About) 2 hours later, I returned home,(.)then（Then） I with my mother go(went) out to swim,(.) I came home after dinner, and then I started to do the(删掉) homework.
　　
　　括号里的是修改后的内容。