For all verbs except be and have, we use
do • does or
did to make Yes/No questions in the present simple and past simple:
They work hard.
Do they work hard?
He works hard.
Does he work hard?
They worked hard.
Did they work hard?
For all verbs except be and have, we use
do • does + not or
did + not to make negatives in the present simple and past simple:
They work hard.
They
do not work hard.
He works hard.
He
does not work hard.
They worked hard.
They
did not work hard.
Here are the question forms and negative forms for be in the present simple and past simple:
Present simple
Positives
I am
He is
She is
It is
You are
They are
Questions
Am i?
Is he?
Is she?
Is it?
Are you?
Are they?
Negatives
I am not
He is not
She is not
It is not
You are not
They are not
Past simple
Positives
I was
He was
She was
It was
You were
They were
Questions
Was i?
Was he?
Was she?
Was it?
Were you?
Were they?
Negatives
I was not
He was not
She was not
It was not
You were not
They were not
We make questions and negatives with
have in two ways. Usually we use
do • does or
did:
Do you
have plenty of time?
Does she
have enough money?
Did they
have any useful advice?
I
don't have much time.
She
doesn't have any money.
They
didn't have any advice to offer.
but we can also make questions by putting
have • has or
had in front of the subject:
Have you plenty of time?
Has she enough money?
Had they any useful advice?
and make negatives by putting
not or
n't after
have • has or
had:
I have
n't much time.
She has
n't any money.
He had
n't any advice to offer.