English grammar_ Noun possessive

1> Possessive form

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1.1> N’s

a dog’s tail
Dog's tail .

• Singular noun -> * N’s

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1.2> Ns’

birds’ nest
Bird nest

• Regular plural nouns -> Ns’

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1.3> N’s

children’s toys
Children's toys

• Irregular plural nouns -> N’s

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2 > possessive case + place

Let’s go to McDonald’s.
Let’s go to McDonald’s fast food restaurant.
Let's go to McDonald's .

My sisiter sometimes stays grandmothe’s.
My sisiter sometimes stays grandmothe’s house.
My sister occasionally stays at Grandma's house .

• possessive case + place , Everyone knows the location , Place omitted .

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3 > Inanimate possessive of

the roof of shool is red.
The roof of the school is red .

• roof It's the subject , Subject begins ;
• the shool’s roof , Don't say so
• of Table content , The roof is part of the school ;

the foot of the mountain
At the foot of the mountain

the legs of a desk
The foot of the desk .

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4 > possessive case to

The answer to the question
The answer to this question ;

• to , Add a point in the direction ;
  The answer to this question , So use to;

the ticket to this game
Tickets for this game

the key to the door
The key to this door .