All ER ending verbs (that are regular) will have conjugation done in this way for present, past and future conditions. Some regular ER ending verbs are listed below these charts.

Present Tense		drop -ER ending and add:
I	yo	-o	vender (to sell) => yo vendo (I sell)
you (informal)	tu	-es	tu vendes (you sell)
you (formal)	usted	-e	ud. vende (you sell)
we	nosotros	-emos	nosotros vendemos (we sell)
you (informal)	vosotros	-éis	vosotros vendéis (you all/they sell)
you (formal)	ellos, ustedes	-en	uds. venden (you all/they sell)

 

Past Tense		drop -ER ending and add:
I	yo	-í	vender (to sell) => yo vendí (I sold)
you (informal)	tu	-iste	tu vendiste (you sold)
you (formal)	usted	-ió	ud. vendió (you sold)
we	nosotros	-imos	nosotros vendimos (we sold)
you (informal)	vosotros	-isteis	vosotros vendisteis (you all/they sold)
you (formal)	ellos, ustedes	-ieron	uds. vendieron (you all/they sold)

 

Future Tense		drop -ER ending and add:
I	yo	-eré	vender (to sell) => yo venderé (I will sell)
you (informal)	tu	-erás	tu venderás (you will sell)
you (formal)	usted	-erá	ud. venderá (you will sell)
we	nosotros	-eremos	nosotros venderemos (we will sell)
you (informal)	vosotros	-eréis	vosotros venderéis (you all/they will sell)
you (formal)	ellos, ustedes	-erán	uds. venderán (you all/they will sell)

 

absorber	to absorb	aprehender	to apprehend
aprender	to learn	barrer	to sweep
beber	to drink	comer	to eat
cometer	to commit	compeler	to compel
comprender	to understand	conceder	to concede
contester	to answer	correr	to run
creer	to believe	deber	to owe / to have to
depender	to depend	esconder	to hide
exceder	to exceed	leer	to read
meter	to insert	poseer	to own / possess
preparer	to prepare	prender	to switch on
proceder	to proceed	prometer	to promise
romper	to break	sorprender	to surprise
tejer	to weave	temer	to fear
toser	to cough