Động từ "to be"
Mở rộng vốn từ với các ví dụ thực tế
The verb 'to be' means to exist or to describe a state. It has three present-tense forms: am (with I), is (with he / she / it), and are (with you / we / they).
Unlike many languages, English never drops 'to be' from a sentence. You cannot say 'I student' — it must be 'I am a student'.
Ví dụ
I am a student.
I → am. Never drop the verb.
She is a doctor.
he / she / it → is.
We are ready.
you / we / they → are.
I am
/aɪ æm/
I am a student.
you are
/juː ɑːr/
You are my friend.
he is
/hiː ɪz/
He is happy.
she is
/ʃiː ɪz/
She is a doctor.
it is
/ɪt ɪz/
It is cold today.
we are
/wiː ɑːr/
We are ready.
they are
/ðeɪ ɑːr/
They are tired.
Choose the correct form: She ___ a doctor.
Fill in the correct form: We ___ ready.
In natural speech and informal writing, 'to be' is almost always contracted: I am → I'm, you are → you're, he is → he's. The apostrophe replaces the missing letter.
Contractions sound more natural and are far more common than the full forms. 'I'm hungry' is what you will hear; 'I am hungry' sounds deliberate or emphatic.
Ví dụ
I'm hungry.
I am → I'm.
He's at home.
he is → he's.
They're late.
they are → they're.
I'm
/aɪm/
I'm hungry.
you're
/jʊər/
You're right.
he's
/hiːz/
He's at home.
she's
/ʃiːz/
She's busy.
it's
/ɪts/
It's cold today.
we're
/wɪər/
We're ready.
they're
/ðeər/
They're late.
Contract the verb: He is at home. → ___ at home.
Which contraction is correct for 'they are'?
To make a negative sentence, add 'not' after the form of 'to be': I am not, she is not, we are not.
In everyday English, 'is not' contracts to 'isn't' and 'are not' to 'aren't'. Note that 'am not' has no standard contraction — we say 'I'm not', never 'I amn't'.
Ví dụ
I am not sure.
am + not. Shortened to 'I'm not'.
She isn't here.
is not → isn't.
We aren't ready.
are not → aren't.
I'm not
/aɪm nɒt/
I'm not sure.
isn't
/ˈɪzənt/
She isn't here.
aren't
/ɑːrnt/
We aren't ready.
Choose the correct negative: She ___ here.
Make it negative: We are ready. → We ___ ready.
To turn a 'to be' statement into a question, move the verb to the front — before the subject: You are ready → Are you ready? He is a teacher → Is he a teacher?
Short answers repeat only the verb: Yes, I am. / No, she isn't. Never say 'Yes, she is a doctor' in a short answer.
Ví dụ
Are you OK?
are moves in front of you.
Is he a teacher?
is moves in front of he.
Am I right?
am moves in front of I.
Am I?
/æm aɪ/
Am I right?
Are you?
/ɑːr juː/
Are you OK?
Is he?
/ɪz hiː/
Is he a teacher?
Is it?
/ɪz ɪt/
Is it cold?
Turn into a question: You are ready. →
Complete the question: ___ he a teacher?
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Tiếp
Present Simple