Coser means 'to sew', and it is a regular -er verb tied to crafts and practical tasks. Cose un botón (sew on a button), mi abuela sabe coser (my grandmother knows how to sew). Because hobbies and practical skills come up in free-time topics, coser is a useful, if specialised, verb. Take care not to confuse it with cocer ('to boil / cook'), which sounds similar — a classic spelling and pronunciation trap. As a regular -er verb the conjugation is predictable, and the idiom ser coser y cantar ('to be a piece of cake') is a fun expression to know.
Quick facts
Coser (to sew) is a regular -er verb.
Real sentences across different tenses — the kind of thing you'd actually say or write.
Cose un botón (sew on a button).
Sabe coser (she knows how to sew).
Coser (sew) vs cocer (boil/cook).
Ser coser y cantar (to be a piece of cake).
Fixed expressions worth knowing — they come up in listening, reading and writing tasks.
Idiomatic expressions
coser is a regular -er verb — it follows the standard -er pattern in every tense. That makes it a good one to drill: if you know coser, you know the template for all regular -er verbs.
Type conjugations from memory and get instant feedback. That's how you actually build the automatic recall the exam needs — not from reading tables.
Practice coser now →Three questions, no account needed. Type the form, then press Enter or tap Check.
yo: coso, tú: coses, él: cose, nosotros: cosemos, vosotros: coséis, ellos: cosen
The past participle is cosido (he cosido) and the gerund is cosiendo (estoy cosiendo).
Coser is on the AQA and Eduqas GCSE Spanish vocabulary lists, but not on Edexcel.
Verbs that are easy to confuse with coser or that behave like it.
Coser is on the AQA and Eduqas GCSE Spanish vocabulary lists, but not on Edexcel. Compare the exam boards.
Written by Daniel Holmes for GCSE & A-Level Spanish students.