Tengo un libro.
I have one book.
vocabulary · numbers dates time
Count from zero to twenty
Recognize the first numbers and use one with a noun.
Remember
0–20 · uno → un / una
Learn 0–15 as individual words; 16–19 join dieci- to the unit. Twenty is veinte. Uno is standalone; before a masculine noun use un, and before a feminine noun use una.
See the difference
Tengo una hermana.
I have one sister.
Hay veinte estudiantes.
There are twenty students.
Audio help
Voices are automatic: Orus reinforces masculine personal descriptions; Leda is used for feminine, neutral or ambiguous content. Explicit speaker metadata takes priority. Ordinary masculine nouns do not select a male voice. New recordings are prepared only on Play and saved for reuse. Both voices share the owner-approved monthly budget and 100 new recordings per browser profile per UTC day. Cached audio remains available when the budget is reached. If Google audio is unavailable, Spanish browser audio is labeled Browser Voice. If playback is blocked, use Tap to Play.
Loading saved practice position…
Native curriculum · Authored teaching examples, not quotations from your imported sources. Cards are self-reviewed, not an objective quiz or mastery score. Listen only when you choose; no audio is generated on page load.