The grammaticalisation of the future and conditional tense in the history of Ibero-Romance: a language and dialect contact approach. Ghent University
The development of the future and conditional tense in Castilian – as in Romance in general – has been universally acknowledged as a typical case of grammaticalisation, whereby the two components of the Latin periphrasis [infinitive + HABERE] fused into a synthetic form (cantaré, cantaría). In Old Castilian variation between synthetic forms and analytic forms (cantar lo é, cantar lo ía) can be witnessed, which indicates that the ...