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语法
Nouns and determiners A1 A2

Possession

Use 's, of, my, mine, and related forms to show ownership and relationships.

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图解

Possession: name the thing or not?

Possession = OWNER ↔ THING

Will you SAY the noun (thing name)?

YES → BEFORE the noun
       my / David's + noun
       This is my coat.
       David's sister is here.

NO  → ALONE
       the thing name is already clear
       mine / Anna's
       This coat is mine.

PART / ROLE inside a bigger thing → of
       The end of the film was surprising.

If you name the thing, put the possession form before it; if the thing is understood, use the alone form; use of for part/role links.

Introduction

Possession means a link

Possession shows a link between a noun and an owner or source: ownership, family, parts, roles, or belonging. It does not always mean legal ownership. My phone is new. David's sister is here. English normally shows the link in three ways: a possessive word before a noun, an 's form after the owner, or an of phrase after the thing. The useful question is: is the possessive word before a noun, or does it replace the noun?
Core 语法 A1 词汇 A1 Neutral

My phone is new.

A possessive determiner before a noun shows who the noun is connected to.

语块拆解

按语块读句子，别逐词读哦。

My phone
possessive_determiner_before_noun
A possessive determiner comes before the noun it identifies.
整体记忆
is new
predicate
This says something about the possessed thing.
Core 语法 A1 词汇 A1 Neutral

David's sister is here.

Possession can describe relationships such as family.

语块拆解

按语块读句子，别逐词读哦。

David's sister
owner_s_relationship
's can show a family relationship, not only ownership.
整体记忆
is here
predicate
This gives the situation of that person.
Core logic

Before a noun or instead of a noun

Use possessive determiners before a noun: my, your, his, her, its, our, their. They point to which noun you mean. This is my coat. Is that your laptop? Use possessive pronouns without a noun: mine, yours, his, hers, ours, theirs. They replace a full noun phrase, often to avoid repetition. This coat is mine means this coat is my coat. No, it isn't yours means it isn't your laptop. Do not use the before my, your, or another possessive determiner.
Core 语法 A1 词汇 A1 Neutral

This is my coat.

My is a possessive determiner, so it must go before a noun.

语块拆解

按语块读句子，别逐词读哦。

This is my coat
this_is_possessive_determiner_noun
Use my before a noun.
整体记忆
Core 语法 A1 词汇 A1 Neutral

This coat is mine.

Mine is a possessive pronoun, so it replaces the noun phrase instead of standing before a noun.

语块拆解

按语块读句子，别逐词读哦。

This coat
possessed_thing_as_subject
The thing being identified is the subject.
is mine
standalone_possessive_pronoun
Mine replaces my coat and stands alone.
整体记忆
Question 语法 A1 词汇 A1 Neutral

Is that your laptop?

In questions, the possessive determiner stays before the noun.

语块拆解

按语块读句子，别逐词读哦。

Is that
yes_no_question_frame
This starts a yes/no question with be.
your laptop
possessive_determiner_noun
Your comes before the noun laptop.
整体记忆
Negative 语法 A1 词汇 A1 Neutral

No, it isn't yours.

A possessive pronoun can stand alone after a negative verb form.

语块拆解

按语块读句子，别逐词读哦。

No, it isn't
negative_short_answer
A negative short answer follows normal be grammar.
yours
standalone_possessive_pronoun
Yours replaces your laptop.
整体记忆
Core pattern

Owner + 's + noun

With people, animals, and many groups, put the owner first and add 's: owner + 's + noun. Mia's keys are on the table. For a regular plural ending in s, put only an apostrophe after the s: My parents' house is near the station. For an irregular plural, add 's: The children's room is quiet. With names ending in s, both James's office and James' office are used; James's is common in learning materials. The noun after the 's form can be left out when it is clear from context.
Core 语法 A1 词汇 A1 Neutral

Mia's keys are on the table.

For one person, add 's to the owner and place it before the noun.

语块拆解

按语块读句子，别逐词读哦。

Mia's keys
owner_s_noun
Owner + 's comes before the thing owned.
整体记忆
are on the table
location_phrase
This says where the keys are.
Core 语法 A2 词汇 A1 Neutral

My parents' house is near the station.

Parents is plural, so the possessive apostrophe comes after the plural s.

语块拆解

按语块读句子，别逐词读哦。

My parents' house
plural_owner_apostrophe
A regular plural ending in s takes an apostrophe after the s.
整体记忆
is near the station
location_predicate
This describes where the house is.
Core 语法 A2 词汇 A1 Neutral

The children's room is quiet.

Irregular plurals that do not end in s normally take 's.

语块拆解

按语块读句子，别逐词读哦。

The children's room
irregular_plural_owner_s
Children is an irregular plural, so add 's.
整体记忆
is quiet
predicate
This describes the room.
Usage rules

Of for parts, roles, and long owners

Use of when the first noun is a thing, a part, a place, or a longer description. Of often builds a chain from the thing to its part, position, or source. The end of the film was surprising. It is also common for roles inside places or organizations: The manager of the restaurant called me. For a simple person owner in everyday speech, 's usually sounds better than of: My brother's car is outside, not the car of my brother. Organizations can use either pattern depending on style.
Core 语法 A2 词汇 A2 Neutral

The end of the film was surprising.

Of is natural for parts or positions in things.

语块拆解

按语块读句子，别逐词读哦。

The end of the film
of_part_phrase
Of links a thing to its part or position.
整体记忆
was surprising
predicate
This gives information about that part.
Core 语法 A2 词汇 A1 Neutral

The manager of the restaurant called me.

Of is common for roles inside places or organizations.

语块拆解

按语块读句子，别逐词读哦。

The manager of the restaurant
role_of_place
Of links a role to the place or organization it belongs to.
整体记忆
called me
action
This says what that person did.
Contrast 语法 A1 词汇 A1 Neutral

My brother's car is outside.

With simple person owners, 's usually sounds more natural than of.

语块拆解

按语块读句子，别逐词读哦。

My brother's car
person_owner_s_noun
For a simple person owner, 's is the normal everyday choice.
整体记忆
is outside
location_predicate
This says where the car is.
Sentence xray

Questions and negatives

Whose asks for the owner. In Whose coat is this?, whose belongs with coat and asks which person has the coat. A short answer can use 's without repeating the noun: It's Anna's means it is Anna's coat. Negatives follow the normal verb pattern. This isn't my seat keeps my before the noun seat. That bag isn't mine uses mine alone after be. The word order changes for questions, but the possessive form itself does not change.
Question 语法 A1 词汇 A1 Neutral

Whose coat is this?

Whose asks which person owns or is connected to something.

语块拆解

按语块读句子，别逐词读哦。

Whose coat
whose_question
Whose asks for the owner of the noun coat.
整体记忆
is this
identification_question
This asks about the item near the speaker.
Spoken 语法 A1 词汇 A1 Neutral

It's Anna's.

's can stand alone when the noun is clear from context.

语块拆解

按语块读句子，别逐词读哦。

It's Anna's
short_answer_with_understood_noun
Anna's means Anna's coat; the noun is understood.
整体记忆
Negative 语法 A1 词汇 A1 Neutral

This isn't my seat.

A possessive determiner still goes before a noun in negative sentences.

语块拆解

按语块读句子，别逐词读哦。

This isn't
negative_be_frame
A normal negative be form.
my seat
possessive_determiner_noun
My must stay before the noun seat.
整体记忆
Negative 语法 A1 词汇 A1 Neutral

That bag isn't mine.

A possessive pronoun can stand alone in a negative sentence.

语块拆解

按语块读句子，别逐词读哦。

That bag isn't
negative_subject_frame
The thing is the subject, followed by a negative be form.
mine
standalone_possessive_pronoun
Mine stands alone and replaces my bag.
整体记忆
Form variations

Forms to recognize

The form changes with the owner, not with the thing owned. Before a noun, use my, your, his, her, its, our, their. Alone, use mine, yours, his, hers, ours, theirs. His has the same form in both jobs; her changes to hers when it stands alone. Its is normally used before a noun, not as an everyday standalone pronoun. To add emphasis, put own after a possessive determiner: I have my own room. For one person among your contacts, use of plus a possessive pronoun: She is a friend of mine.
Core 语法 A2 词汇 A1 Neutral

I have my own room.

Own adds emphasis to the possessive idea.

语块拆解

按语块读句子，别逐词读哦。

my own room
own_emphasis
Own after a possessive determiner emphasizes personal possession or independence.
整体记忆
I have
have_frame
Have introduces possession.
Core 语法 A2 词汇 A1 Neutral

She is a friend of mine.

A friend of mine is natural; a friend of me is not.

语块拆解

按语块读句子，别逐词读哦。

a friend of mine
double_possessive_relationship
Of plus a possessive pronoun means one of my friends.
整体记忆
She is
identity_frame
This identifies the person.
Contrast

Its, it's, and apostrophe 's

Closest common confusion: possessive its versus the contraction it's. Its has no apostrophe and shows possession. It's means it is or it has. The hotel changed its name. It's open now means it is open now. The same written 's can have different jobs after names and nouns. If another noun follows, it is often possession, as in Anna's coat. If a verb idea follows, it may be a contraction, as in Anna's here. Read the whole sentence, not just the apostrophe.
Contrast 语法 A1 词汇 A1 Neutral

The hotel changed its name.

Its has no apostrophe when it shows possession.

语块拆解

按语块读句子，别逐词读哦。

its name
possessive_its_before_noun
Its is possessive and comes before a noun.
整体记忆
The hotel changed
subject_action
This gives the subject and action.
Contrast 语法 A1 词汇 A1 Neutral

It's open now.

It's is a contraction and should not be confused with possessive its.

语块拆解

按语块读句子，别逐词读哦。

It's open now
contraction_it_is
It's means it is, not possession.
整体记忆
Danger zone

Common traps

Common errors usually come from swapping the two possessive jobs. Not This is mine coat; say This is my coat, because a noun follows. Not That bag is my; say That bag is mine, because the possessive word stands alone. Not a friend of me; say a friend of mine. For a simple person owner, avoid the heavy of pattern in everyday speech: use Sarah's phone, not the phone of Sarah. Possessive pronouns never take apostrophes: yours, hers, ours, theirs.
Summary

Choose the right possession tool

Choose the possessive form by position and relationship. Before a noun, use my, your, his, her, its, our, their, or an owner + 's form. Without a noun, use mine, yours, his, hers, ours, theirs, or an 's form alone when the noun is understood. Use of especially for parts, things, roles, organizations, and long owner phrases. Check apostrophes carefully: parents' is plural possession, children's is irregular plural possession, and it's is a contraction, not a possessive.
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