Because my high school friend Peter was on the yearbook committee, he managed to have his picture published upside-down (that’s NOT him in the picture below), with the senior quote “Maybe, just maybe, everyone else is wrong”.
In our family, Peter’s quote has become an anti-trend mini-meme. No Facebook account? Don’t think Seth MacFarlane is funny? Every other “car” in the parking lot is an SUV? Maybe, just maybe…
Believe it or not, I thought of Peter immediately when I looked into the origin of the two biggest Spanish verb groups with irregular yo forms in the present tense: the so-called -zco and -go verbs. (This is particularly ironic because Peter didn’t even take Spanish.) It turns out that from a historical perspective, the yo forms are actually the most REGULAR — that is, most faithful to the original Latin. In a nutshell, their -o ending insulated them from sound changes that affected /k/ before /e/ and /i/; i.e. before front vowels.
So in this case, everyone else IS wrong, or at least linguistically radical.
For -zco verbs like florecer, from Latin florescere, the relevant change was the simplification of /sk/ to /s/ (in Andalucian and Latin American Spanish) or /Θ/ (in Castilian Spanish) before /e/ or /i/. [Note: this is a drastic abbreviation of a process that involved several intermediate steps; see Ralph Penny’s A History of the Spanish Language or another good history of Spanish for details.] So the infinitive changed from florescere to florecer, the tú form from floresces to floreces, and so on. Only florezco kept the /k/ cluster of the original Latin.
For -go verbs like hacer, from Latin facere, the relevant change was the fronting and softening of /k/ to /s/ or /θ/ before front vowels. So the infinitive changed from facere (with a /k/ sound) to hacer, the tú form to haces, and so on. Only haco remained in the present tense as a reflection of the original Latin /k/. Later, a separate change voiced the /k/ to /g/, giving us modern hago. (This /g/ is still a lot closer to /k/ than is /s/ or /θ/.) A similar sequence of events impacted Latin dicere as it evolved into decir, giving us the (yo) digo form.
All the sound changes mentioned above were general, occurring throughout Spanish vocabulary. For example, the /sk/ simplification gave us pez (from Latin pesce), /k/ fronting gave us cielo (from Latin caelu), and /k/ voicing gave us lugar (from Latin locale). The change of /f/ to /h/ in hacer (from facere) is also seen in words like hijo (from Latin filius).
As I described in an earlier post, analogy untidies the results of sweeping sound changes like these. This was certainly the case with the -zco and -go verbs. The verb lucir and related verbs like deslucir adopted the -zco pattern, as did several verbs ending in -ducir, such as producir, even though none of these had an /sk/ cluster in Latin. Likewise, the -go pattern spread to other common verbs including venir, tener, and salir, though at the same time, some verbs originally in the -go group became regular (cocer is one). After these back-and-forths, modern Spanish ended up with almost 100 –zco verbs, and around 10 –go verbs. You can check my Teaching page for a full list of the -zco verbs.
The other irregular yo types — ver, the -oy verbs, and the two -e verbs (haber and saber) –are another story entirely; maybe I’ll post about them later.
[Update: I have now posted about ver.]