That's a good question. It depends on the form the infinitive takes, whether it ends with
-ir. The infinitive of "to walk" is "caminar" and the infinitive of "to drink" is "beber".
Thank you so much sir for that chart , I honestly think that Duolingo should include the present tense chart in the (present tense) lesson ,instead of that useless endings chart they've put....some of us don't have a background on these type of languages so we don't always get it by instinct (Arabic native speaker)
It's been 2 years, so I don't remember what particular information that link had anymore, but this should cover things:
If a verb is regular, then this chart explains how to conjugate into the present tense:
http://www.123teachme.com/ is a good resource for conjugating Spanish verbs.
If you know the infinitive, you can predict whether that vowel will be e or a. It's
caminar, so it goes camino, caminas, camina, caminamos, camináis, caminan. For something like
beber, it would go bebo, bebes, bebe, bebemos, bebéis, beben.
Careful! I clicked on the Spanish-verb-conjugation-chart link and was hit with a ransom virus. I was able to get rid of it by using the "Task Manager" function multiple times to end the function. Lucky me!