Auxiliary DID

I did not call you yesterday

I did not eat yesterday

They did not cook last week

She did not buy a gift

Negative formula:

You did a good job

i didn't understand

Did he write this letter?

¿En que tiempo utilizamos did?

Pasado simple

Ellos no cocinaron la semana pasada

Ella no compró un regalo

no entendí

Sujeto + did not + infinitivo sin to

¿Él escribió esta carta?

Yo no comí ayer

No te llamé ayer

Hiciste un buen trabajo

Harry Styles