In this course, the language elements presented are divided into groups. Below are theoretical (and somewhat dry) explanations of those groups. Read the explanations if you want, but that isn't absolutely necessary to be able to do the course.
Numbers are created by putting together the basic numerals. Tens and hundreds are put together into one word. Everything else, including thousands, should be pronounced and written as separate words. Ordinary numbers are not declined (they don't take the -o, -j, -n, etc endings). Ordinal numbers are created by adding the ending -a to regular numbers. They are declined as adjectives. - More information
Question words and answer words linked to them are organized using another system, the so-called correlative table. It consists of five first syllables and nine second syllables combined in various ways. The ki-words are also used as relative pronouns. - More information
Participles are words that present an action or a quality, a state: writing, having been hit, closed, etc. In Esperanto there are 6 different endings for participles. - More information
Pronouns are the words: I, you, she, he, it, we, they, one, oneself. - More information
Adverbs are words that indicate manner, place, time, or quantity. Adverbs can describe a verb, an adjective, an adverb, or a whole phrase. Here are some of the most common adverbs in Esperanto. (You can also create adverbs from other kinds of words using the -e ending.) - More information
A preposition is a short word that shows the role of a part of a phrase, in the whole phrase. - More information
A prefix is placed before words to create new words. A suffix is placed after words to create new words. - More information
Endings are put after a root, a compound word, or a short word, to make a new word, or to change the meaning of a word. O, A, E, I, AS, IS, OS, US, and U are endings for word classes. J is the plural ending. N is the accusative ending.
Some of the most common roots in Esperanto.