英语作文,有几个语法错,刚刚考完期末,10分大约能拿多少分

My last sunday it was great,
——多了一个it.
In the morning i did some homework,
Then i am went to supermarket and bought some food.
——多了一个am.
In the afternoon,I cleaned my room,because it was very dirty,
Afterthat I cooked a dinner for my mom,
Fially i played basketball with my mother.
It was a fantastic weekend.
两个明显语法错误,扣2分.