Conjugation of ostaa in Finnish
ostaato buyregular
Preesenspresent
Actions happening now or habitually.
| Person | Conjugation | |
|---|---|---|
| minä | ostan | |
| sinä | ostat | |
| hän | ostaa | |
| me | ostamme | |
| te | ostatte | |
| he | ostavat |
Common mistakes in the Preesens
- sinä
ostaatostatThe 2nd person singular present is ostat, not *ostaat*; the stem is osta- with -t. - hän
ostaaaostaaIn the 3rd person singular present, the correct form is ostaa; do not add an extra vowel or personal ending.
Imperfektisimple past
Completed actions in the past.
| Person | Conjugation | |
|---|---|---|
| minä | ostin | |
| sinä | ostit | |
| hän | osti | |
| me | ostimme | |
| te | ostitte | |
| he | ostivat |
Common mistakes in the Imperfekti
- hän
ostiäostiThe past tense of ostaa is osti; do not add an infinitive ending.
Perfektipresent perfect
Past actions with a bearing on the present.
| Person | Conjugation | |
|---|---|---|
| minä | olen ostanut | |
| sinä | olet ostanut | |
| hän | on ostanut | |
| me | olemme ostaneet | |
| te | olette ostaneet | |
| he | ovat ostaneet |
Common mistakes in the Perfekti
- me
olemme ostanutolemme ostaneetWith me/te/he, the perfect uses the plural participle: olemme ostaneet.
Pluskvamperfektipluperfect
Actions completed before another past action.
| Person | Conjugation | |
|---|---|---|
| minä | olin ostanut | |
| sinä | olit ostanut | |
| hän | oli ostanut | |
| me | olimme ostaneet | |
| te | olitte ostaneet | |
| he | olivat ostaneet |
Common mistakes in the Pluskvamperfekti
- he
olivat ostanutolivat ostaneetPlural subjects take ostaneet in the pluperfect: olivat ostaneet.
Konditionaaliconditional
Actions that would happen under some condition.
| Person | Conjugation | |
|---|---|---|
| minä | ostaisin | |
| sinä | ostaisit | |
| hän | ostaisi | |
| me | ostaisimme | |
| te | ostaisitte | |
| he | ostaisivat |
Common mistakes in the Konditionaali
- minä
ostasinostaisinThe conditional is ostaisin, not *ostasin*; the vowel stem changes to ostaisi-.
Imperatiiviimperative
Commands and requests.
| Person | Conjugation | |
|---|---|---|
| sinä | osta | |
| hän | ostakoon | |
| me | ostakaamme | |
| te | ostakaa | |
| he | ostakoot |
Common mistakes in the Imperatiivi
- sinä
ostatostaImperative 2nd singular is the basic stem: osta. - me
ostakaaostakaammeostakaa is 2nd person plural imperative; 1st person plural is ostakaamme.
ostaa — frequently asked questions
Is ostaa a regular verb?
Yes — ostaa is a regular Finnish verb, so it follows the standard endings for its group.
What does ostaa mean?
ostaa is a Finnish verb meaning "to buy".