Mis últimas vacaciones: prenominal adjectives, preterite questions

In questions, to say 'a', 'an' or ‘any’ before masc. sing. nouns use ‘algún’ and 'algunos' before masc. pl. nouns. In questions, to say 'a', 'an' or ‘any’ before fem. sing. nouns use ‘alguna’ and 'algunas' before fem. pl nouns. Some adjectives can go before the noun. These are called 'prenominal adjectives'. Prenominal adjectives 'primero', 'tercero', 'bueno', 'malo' and 'alguno' come before the noun and lose the -o ending. Verbs ending in '-car', 'gar' or '-zar' have a spelling change in 1st person singular in the preterite.