Ludwik Lejzer Zamenhof

“ Every preposition in the international language has a definite fixed meaning. If it be necessary to employ some preposition, and it is not quite evident from the sense which it should be, the word je is used, which has no definite meaning ”

“ The past participle passive ends in it, e.g., far'it'a, “that which has been done”; far'it'e, “having been done”.
i) The future participle passive ends in ot, e.g., far'ot'a, “that which will be done”; far'ot'e, “about to be done”.
All forms of the passive are rendered by the respective forms of the verb est (to be) and the present participle passive of the required verb; the preposition used is de, “by”. E.g., ŝi est'as am'at'a de ĉiu'j, “she is loved by everyone.” 7) Adverbs are formed by adding e to the root. ”

“ The Personal Pronouns are mi, I; vi, thou, you; li, he; ŝi, she; ĝi, it; si, “self”; ni, “we”; ili, “they”; oni, “one”, “people”, (French “on”) . Possessive pronouns are formed by suffixing to the required personal, the adjectival termination. The declension of the pronouns is identical with that of substantives. E.g., mi, “I”; mi'n, “me” (obj.) ; mi'a, “my”, “mine”. 6. The verb does not change its form for numbers or persons, e.g., mi far'as, “I do”; la patr'o far'as, “the father does”; ili far'as, “they do”. Forms of the Verb: a) The present tense ends in as, e.g., mi far'as, “I do”. ”