应该是I usually go shopping with my sister on sunday.
go with sb意思是跟某人去做某事
本句意为“我经常周日跟我姐姐/妹妹去购物”
和某人一起应该用with所以把and改with
I usually go shopping with my sister on Sundays.
I usually go( shopping ) with my mum on Sundays
.
I usually go shopping with my sister on Sundays
and 改成with