To be — explicación

(4) Usamos el verbo auxiliar to be para formar la voz pasiva en inglés. En inglés, hay dos maneras de usar un verbo: activa o pasiva. En el segundo capítulo profundizaremos acerca de la voz pasiva.

To be — contexto

• I am supposed¹ to work every day.
• He wasn’t allowed to come to school today.
• Madrid is visited by many tourists each year.
• The football world championships are held in Russia this year.
• You aren’t allowed to cycle here.
• He isn’t used to travelling.
• He was born² in Munich.
• The car was cleaned by him.
• We weren’t spoken to yesterday by anyone.
• The book was read in two weeks.³

To be — análisis

1. I am supposed to work every day. Recuerda, la pasiva en el pasado simple es: to be + participio pasado. Por lo tanto, en este caso es la primera persona de to be (am) + supposed.
2. He was born in Munich. La forma be born siempre va acompañado del verbo to be. Siempre va en pasiva.
3.  The book was read in two weeks. Hay muchas razones por las que usamos la pasiva en inglés. En el capítulo II vamos a profundizar en ello.