En principio la negación en el simple past funciona como ya lo hemos descrito en el capítulo negación. Aparte del verbo to be and to have, que tienen una negación propia, se forma la negación con to do en el simple past.

ejemplos
In 1980 I went to school. In 1980 I did not go to school.
He bought a bike last month. He did not buy a bike last month.
The school was red still yesterday. The school was not red still yesterday.
He played the piano . He did not play the piano .
Yesterday she gave him a present. Yesterday she did not give him a present.
It was dark and cold, when he came out of the house. It was not dark and cold, when he did not come out of the house.
I read a book the day before yesterday. I did not read a book the day before yesterday.
They saw the light at the end of the tunnel last year. They did not see the light at the end of the tunnel last year.

Por el hecho de que el simple past de los verbos modales es idéntico al condicional muy a menudo hay que negar la perifrasis que sustituye al simple tense ambiguo. (vea también 8º capítulo 8.2.5)

ejemplos
verbo modal => pasado con perífrasis
can => was able to In 1980 I was not able to go to school.
shall => was to He was not to buy a bike (he did it anyway).
must => had to Yesterday she did not have to give him a present.
to may => was allowed to They were not allowed to cross the border.
to will => wanted to I didn't want to do it all over again.