Irregular ER Verbs 2
Spanish: Edexcel IGCSE, topic 8.1.7
Stem Changes in the First Person Present
Some -ER verbs only have a spelling change in the first person singular (‘yo’) form. In all other forms, they follow the regular -ER endings.

Hacer - to do, to make
- Hago - I do.
- Haces - you do.
- Hace - he/she does / you do (formal).
- Hacemos - we do.
- Hacéis - you do (plural).
- Hacen - they do / you do (formal plural).

Poner - to put, to set (the table)
- Pongo - I put.
- Pones - you put.
- Pone - he/she puts / you put (formal).
- Ponemos - we put.
- Ponéis - you put (plural).
- Ponen - they put / you put (formal plural).

Traer - to bring
- Traigo - I bring.
- Traes - you bring.
- Trae - he/she brings / you bring (formal).
- Traemos - we bring.
- Traéis - you bring (plural).
- Traen - they bring / you bring (formal plural).
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Caerse - to fall
- Me caigo - I fall.
- Te caes - you fall.
- Se cae - he/she falls / you fall (formal).
- Nos caemos - we fall.
- Os caéis - you fall (plural).
- Se caen - they fall / you fall (formal plural).
Stem Changes in the First Person
Some ER verbs only change their stem in the first person 'yo' form. After this, they follow the same pattern as regular ER verbs.

Conocer - being familiar with
- Conozco - I know.
- Conoces - you know.
- Conoce - he/she knows / you know (formal).
- Conocemos - we know.
- Conocéis - you know (plural).
- Conocen - they know / you know (formal plural).

Conocer / Saber
- 'Saber' is used for knowing facts or how to do something.
- 'Conocer' is used for being familiar with people, places, or things.
- Yo sé hacer ecuaciones.
- I know how to do equations.
- Yo conozco a Juan.
- I know Juan.

Saber - knowing
- Sé - I know.
- Sabes - you know.
- Sabe - he/she knows / you know (formal).
- Sabemos - we know.
- Sabéis - you know (plural).
- Saben - they know / you know (formal plural).

Agradecer - to thank
- Agradezco - I thank.
- Agradeces - you thank.
- Agradece - he/she thanks / you thank (formal).
- Agradecemos - we thank.
- Agradecéis - you thank (plural).
- Agradecen - they thank / you thank (formal plural).

Desaparecer - to disappear
- Desaparezco - I disappear.
- Desapareces - you disappear.
- Desaparece - he/she disappears / you disappear (formal).
- Desaparecemos - we disappear.
- Desaparecéis - you disappear (plural).
- Desaparecen - they disappear / you disappear (formal plural).

Nacer - to be born
- Nazco - I am born.
- Naces - you are born.
- Nace - he/she is born / you are born (formal).
- Nacemos - we are born.
- Nacéis - you are born (plural).
- Nacen - they are born / you are born (formal plural).

Parecer - to seem, appear
- Parezco - I seem.
- Pareces - you seem.
- Parece - he/she/it seems / you seem (formal).
- Parecemos - we seem.
- Parecéis - you seem (plural).
- Parecen - they seem / you seem (formal plural).
Test yourself on Irregular ER Verbs 2
How do you say 'they fall' in the present tense in Spanish?
How do you say 'they know' in Spanish?