Im not sure how much this helps, but it looks like you are just looking at the verb deciding if it’s imperfecto or pretérito so here are the conjugations for both.
pretérito:
yo-í
tú-iste
él-ió
nosotros-imos
ellos-ieron
imperfecto:
yo-ía
tú-ias
él-ia
nosotros-iamos
ellos-ian
I know this really good website called SpanishDict. It is a English to Spanish dictionary. It is 100% reliable. This will help you in future Spanish classes.
<span>carisimo
rápidisimo
riquisimo
larguisimo
fácilisimo
jovensismo
famosisimo
anchisimo</span>
La respuesta seria nosotros; Por lo tanto nosotros investigamos el destino y las costumbres locales.
