This week is boxing week.I went to Vancouver shopping with my friends.求检查语法错误还有一句 I bought some t-shirt and hoody.They are really cheap.

This week was(过去式 使用is的过去时) a（名词前缺少代词加上a） boxing week(什么叫boxing week 请指教).I went to Vancouver going (固定搭配购物 动名词形式应该是做伴随状语) shopping with my friends,I bought some T-shirts(名词复数加“s”) and hoddies(名词复数 y变i加es).They are really sheap(这是事实 ----不确定是不是改成过去时的were).

shopping改成to shop表目的
t-shirts and hoodies