Estructura de la forma afirmativa.
Sujeto + had+ participio del verbo que se conjuga:
I had worked ( Yo había trabajado) / I´d worked
You had worked/ you´d worked
he had worked/ he´d worked
etc...
Estructura de la forma negativa.Sujeto + had+ not + participio pasado del verbo que se conjuga.
I had not worked / I hadn´t worked
you had not worked / you hadn´t worked
he had not worked / he hadn´t worked
Estructura de la forma interrogativa:
had+ sujeto+ participio pasado del verbo que se conjuga.
had I worked?
had you worked?
had he worked?
