这段文章有语法之类的问题吗

题目

这段文章有语法之类的问题吗
A Day For Me
正文：Today is Sunday.I love Sundays.But today I'm very unhappy.Because we have lots of homework,and these homework are very difficult,like Math.
I got up at seven o'clock and did my homework.After that,T went to study English,Math and composition.T went back home at 16:00 and did my homework.
Just now,T'm fnishing my homework.
What a day for me!

答案

homework是不可数名词,怎么用these,应该用this,后面改做is.T went to study English,T改为I.T went back home at 16:00 and did my homework.
T改为I.Just now是刚才,后面怎么能用现在时?