I had spent my holiday at home.
Ma być: I SPENT my holidayS.
Everyday I went swim in the lake witch my friends.
Ma być: Everyday I went swim (możesz też napisać I swam) WITH my friends.
After that we went to play football to late night.
Tu jest dobrze.
But when we played football I fishing witch my friend.
Nie mam pojęcia o co chodzi w tym zdaniu, chciałeś napisać, że kiedy koledzy grali w piłkę, ty łowiłeś ryby? Jeśli tak, to ma być: But when my friends played football I was fishing with my other friend.
But sometimes it rained all day and I must stay at home.
Ma być: But sometimes it rained all day and I HAD TO stay at home.
Then I played computer games and watched TV.
One day in week we visited grandparents and we help them witch work.
Ma być: One day (wywaliłabym to "in week") we visited grandparents and we HELPED them WITH work.
In my opinion summer time pass very quickly but are very interesting.
Ma być: In my opinion A summer time PASSED very quikly but IT WAS very interesting.
Mam nadzieję, że pomogłam : ).