While only the Portuguese verb beber (to drink) is used as the example for the 2nd conjugation, the rules contained here pertain to all regular verbs ending in -er except irregular verbs ending in -er. View the list of singular and plural subject pronouns and the notations used here before proceeding.

IMPERSONAL (to drink)
PERSONAL INFINITIVE (me to drink)
PARTICIPLES & GERUND (drunk, drinking)

INDICATIVE MOOD (SIMPLE)
PRESENT INDICATIVE (I drink)
IMPERFECT INDICATIVE (I was drinking/I used to drink)
PRETERIT INDICATIVE (I spoke)
PLUPERFECT INDICATIVE (I had drunk)
SIMPLE FUTURE INDICATIVE (I will drink/I shall drink)
COMPOUND FUTURE INDICATIVE (I will drink/I shall drink)

INDICATIVE MOOD (COMPOUND)
PRESENT PERFECT INDICATIVE (I have drunk/I have been drinking)
PLUPERFECT INDICATIVE (I had drunk)
FUTURE PERFECT INDICATIVE (I will have drunk/I shall have drunk)

SUBJUNCTIVE MOOD (SIMPLE)
(The SUBJUNCTIVE occurs in the DEPENDENT CLAUSE of a sentence)
PRESENT SUBJUNCTIVE (I may drink)
IMPERFECT SUBJUNCTIVE (I might drink)
FUTURE SUBJUNCTIVE (if I were to drink/if I would drink/if I should drink/if I may drink/if I might drink)

SUBJUNCTIVE MOOD (COMPOUND)
(The SUBJUNCTIVE occurs in the DEPENDENT CLAUSE of a sentence)
PRESENT PERFECT SUBJUNCTIVE (I may have drunk)
PLUPERFECT SUBJUNCTIVE (I might have drunk)
FUTURE PERFECT SUBJUNCTIVE (if I were to drink/if I would drink/if I should have drunk/if I may have drunk/if I might have drunk)

CONDITIONAL MOOD
(The Conditional is called the preterit future in Portuguese)
SIMPLE (I would drink/I should drink)
COMPOUND (I would have drunk/I should have drunk)

IMPERATIVE MOOD
AFFIRMATIVE FORM (drink thou/you/we/ye/they)
NEGATIVE FORM (don't drink thou/you/we/ye/they)