While only the Portuguese verb falar (to speak) is used as the example for the 1st conjugation, the rules contained here pertain to all regular verbs ending in -ar except irregular verbs ending in -ar. View the list of singular and plural subject pronouns and the notations used here before proceeding.

IMPERSONAL (to speak)
PERSONAL INFINITIVE (me to speak)
PARTICIPLES & GERUND (spoken, speaking)

INDICATIVE MOOD (SIMPLE)
PRESENT INDICATIVE (I speak)
IMPERFECT INDICATIVE (I was speaking/I used to speak)
PRETERIT INDICATIVE (I spoke)
PLUPERFECT INDICATIVE (I had spoken)
SIMPLE FUTURE INDICATIVE (I will speak/I shall speak)
COMPOUND FUTURE INDICATIVE (I will speak/I shall speak)

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

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

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

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

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