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Anh Văn

Present simple

verb / verb-s

Affirmative

Subject Verb (present tense)
I
You
We
You
They
work well.
He/She/It works

The present simple form of the verb is identical to the base form in all persons except the third person singular. The third person singular is formed by adding –s to the base form. Note the changes in spelling:

work » works
live » lives
stay » stays
try » tries
(a final –y changes to –ie– after a consonant)
wash » washes; kiss » kisses; watch » watches; box » boxes (we add –es after –sh, –s, –ch and –x)
go » goes
(we add –es)
do » do
es (we add –es)
have » has

Negative

In the negative, we use the auxiliary do + not followed by the bare infinitive in all persons except the third person singular. In the third person singular we use does + not:

Subject Auxiliary not Verb (bare infinitive)
I
You
We
You
They
do not work well.
He/She/It does

The contracted forms don’t and doesn’t are often used instead of do not and does not in spoken and in informal written language.

Interrogative

In the interrogative, we use the auxiliary do followed by the subject and the bare infinitive in all persons except the third person singular. In the third person singular, we use does:

(Question word) Auxiliary Subject Verb (bare infinitive)
How do I
you
we
you
they
work?
does he/she/it

The verb BE in the present simple

The verb be has irregular present tense forms. In the present simple, the auxiliaries do and does are not used in the negative and interrogative if the main verb is be:

Affirmative Negative Interrogative
I am at home.
You are at home.
He/She/It is at home.
We are at home.
You are at home.
They are at home.
I am not at home.
You are not at home.
He/She/It is not at home.
We are not at home.
You are not at home.
They are not at home.
Am I at home?
Are you at home?
Is he/she/it at home?
Are we at home?
Are you at home?
Are they at home?

The following contracted forms are often used in spoken and in informal written language:

I am » I’m
you are » you’re
he/she/it is » he’s/she’s/it’s
we are » we’re
you are » you’re
they are »
they’re

are not » aren’t
is not »
isn’t           

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