(c) After many prepositions:Lo hice sin pensar.
I did it without thinking.Por no tener dinero, no fuimos a Madrid.
Because we didn’t have any money, we didn’t go to Madrid.Two special constructions use the infinitive: al+ infinitive indicates an adverbial clause,
usually of time, and de+ infinitive indicates a condition:Al comprobar el precio Montse se negó a comprarlo.
When Montse found out the price she refused to buy it.De no haber ido, no habríamos visto a la Reina.
If we hadn’t gone, we wouldn’t have seen the Queen.(d) As an imperative:^69 (p. 385)
Seguir por la Ml hasta llegar a San Alfonso. (see 69.1)
Go along the Ml until you get to San Alfonso.No exponer el aparato a temperaturas extremas. (see 69.2)
Do not expose the product to extreme temperatures.17.12 Gerund
(a) The gerund is used as the complement of seguir and continuar, and sometimes of
verbs of perception instead of the infinitive.Marta siguió cantando.
Marta carried on singing.Vi a los niños jugando en el parque./Vi jugar a los niños en el parque.
I saw the children playing in the park.26.3 and 26.2.2.1 (pp. 140 and 134)
(b) The gerund is normally used as the equivalent of an adverbial clause, expressing
manner, cause, time, condition, concession, etc.51.3 (p. 302)
Salió corriendo.
He ran out. (=‘came out running’)Nos divertimos bailando.
We enjoyed ourselves (by) dancing.Estando en Madrid, fui a saludar a mis primos.
While I was in Madrid, I went to say hello to my cousins.17.12
USE OF THE VERB FORMS