El Condicional Simple also known as El Condicional Imperfecto and El Pospretérito
El Condicional Simple expresses hypothetical actions that would or might happen in the past and in the future. It is also used to express wishes, to give advice and suggestions or to invite and ask in a polite way.
The English conditional is the modal verb ''would'' + main verb, while in Spanish El Condicional is a full set of verb conjugations.
Look at these examples:
El Condicional Simple is linked to El Futuro Simple in a very direct way; verbs in El Condicional Simple have the same stem as the verbs in El Futuro Simple. This is true whether the verbs are regular or irregular, the stems in El Condicional Simple are always the same as the stems in El Futuro Simple.
Have a look at these regular and irregular verbs in both tenses:
Regular verb hablar (to speak)
El Futuro Simple = yo hablaré - I will speak
El Condicional Simple = yo hablaría - I would speak
Irregular verb hacer (to do)
El Futuro Simple = yo haré - I will do
El Condicional Simple = yo haría - I would do
Learn more: Verb tense / mood