Learn Hardcore Esperanto: Hodiaŭ mi estas feliĉa.

Estas is the present tense form of the verb esti (to be). In Esperanto, the verb remains the same regardless of the subject; there’s no variation for I, you, he, etc. This regularity is a hallmark of Esperanto’s grammar.

What does mi mean, and is it always necessary to include a subject pronoun in Esperanto?

Mi translates to I. Although Esperanto verbs have clear endings that often imply the subject, beginners are encouraged to include subject pronouns like mi for clarity and emphasis.

Why does feliĉa end with -a, and what does that reveal about its role in the sentence?

In Esperanto, adjectives end in -a. Thus, feliĉa is an adjective meaning happy. The -a ending clearly marks it as an adjective, distinguishing it from nouns (ending in -o) and adverbs (ending in -e).

Is the word order in Hodiaŭ mi estas feliĉa fixed, or can it be rearranged without changing the meaning?

Esperanto features flexible word order due to its consistent grammatical markers. While Hodiaŭ mi estas feliĉa follows a common structure (time adverb, subject, verb, adjective), rearranging the elements (for example, Mi estas feliĉa hodiaŭ) will typically keep the meaning intact, though it might shift the emphasis slightly.