Объясните по яз правило множественное число сущ. не могу его запомнить

Очень просто
Пример:
Если сущ. окончается на согласную букву то country будет countr(ies) y падает вместо него пишется ies а если на гласную букву то car будет cars просто прибавим {s}

This summer I spent with my grandmother in village. All the day I sit near rabbits. They need fresh green grass. So I’ll take it in the field and gave them. My rabbits more than happy and they grow big according to my help. The mom rabbit give me five small rabbits and I need to save them from the owl. That day owl flying near my small rabbits and want to eat them. Next day too. On the fifth day owl fly into forest and I never met she again. On the end of summer my grandmother thanks me and released me for Habarovsk. I spent few days in Habarovsk. One sunny day I walk quay. There are many ships and yachts near. What the nice view say my mother. So rest of the day we spent in quay. That was the nice summer holidays I ever spent.

I was at home the whole summer.I was walking at the park, talking with my friends and reading a books.This year the summer was very bad, because I was alone.My friend Masha told me she was at the sea for 7 days.I heard this story and say:"Oh, my summer is the worst of the year"!.-"Where is your smile"?,-said Masha.And I entered the room, dressed up and go for a wolk along the street with my best friend.We walked from 6 to 9 o'clock.I saw the ice-cream van.We bought ice-cream and go home.The end.