Las oraciones negativas van acompañadas con “did not” y el verbo va en la forma simple. Tienen la siguiente forma:

Negative form

Subject

Did not

Main verb – Infinitive form

Complement

I

You

He

She

It

We

They

did not (didn’t)

lose

the competition last year.

Las preguntas van acompañadas del auxiliar “did” y se utiliza con todos los pronombres. Es importante recordar que cuando el auxiliar está presente en la pregunta, el verbo va en su forma infinitiva.

Interrogative form

Auxiliary did

Subject

Main verb – Infinitive form

Complement?

Did

I

you

he

she

it

we

they

lose

the competition last year?

Examples:

a. She lost the competition last week. (sentence)
    Did she lose the competition last week? (interrogative form)
b. We lost the competition last week. (sentence)
    Did you lose the competition last week? (interrogative form)