From a study of the reduction of compounds containing two ethylenic bonds united by a single bond, termed a "conjugated system," E.
When applied to benzene, a twofold conjugated system is suggested in which the partial valencies of adjacent atoms neutralize, with the formation of a potential double link.
The form in des has persisted only in those verbs where it was protected by the consonants n or r preceding it: pondes, tendes, vindes, amardes, and also no doubt in some forms of the present of the imperative, where the theme has been reduced to an extraordinary degree by the disappearance of a consonant and the contraction of vowels: ides, credes, ledes, &c. Portuguese is the only Romance language which possesses a personal or conjugated infinitive: amar, amer-es, amar, a,nar-mos, amer-des, amar-em; e.g.
The regular verb caraf, " I love," is conjugated thus Indicative-Pres.
Prepositions also are " conjugated " in Welsh, their objects, if pronominal, being expressed by endings.