To be able to speak Esperanto correctly, you must know the grammar. We are proud to be able to present you with several excellent grammars: a concise one (an overview of Esperanto grammar needed for basic communication), a detailed one (an abbreviated version of the Plena Manlibro de Esperanto-Gramatiko) and "La tuta Esperanto" (which is also available in the "courses" section and is aimed at those who already speak Esperanto).

For specific questions there is a section "Language questions". There you will find frequent language questions about Esperanto with answers, and a form to ask your own question.