Verbs: Aspect and Prefixes

01

The Idea

• Imperfective - the action in progress, repeated, or unbounded: valgyti (to eat, to be eating).
• Perfective - the action seen as finished, with a result reached: suvalgyti (to eat up, to finish eating).

• Valgiau pietus.

  I was eating / ate lunch.

• Suvalgiau pietus.

  I ate up (finished) my lunch.

The difference is not about time - both are past here - but about whether the action is viewed as completed.

02

Prefixes That Complete an Action

Adding a prefix usually turns an imperfective verb into a perfective one. The most common prefixes are pa-, su-, iš-, at-, nu-, par-, per-, už-:

• daryti (to do) → padaryti (to get done)
• gerti (to drink) → išgerti (to drink up)
• rašyti (to write) → parašyti (to write, finish writing)
• skaityti (to read) → perskaityti (to read through)

• Parašyk man žinutę.

  Write me a message. (and finish it)

• Perskaičiau knygą.

  I read the (whole) book.

03

Prefixes Also Change Meaning

A prefix often does more than mark completion - it adds a direction or a shade of meaning, much like English "go in / go out / go away". With eiti (to go):

• ateiti (to come, arrive), išeiti (to leave, go out), nueiti (to go off to), įeiti (to enter), pareiti (to come home)

• Jis išėjo.

  He left.

• Ateik čia.

  Come here.

• Įėjau į kambarį.

  I entered the room.

04

Aspect and the Future

Because a perfective verb names a single finished event, it points naturally to something that will be wrapped up, which is why so many course commands and plans use prefixed (perfective) verbs:

• Susipažinkime.

  Let's get acquainted.

• Rytoj viską padarysiu.

  Tomorrow I will get everything done.

• Suvalgyk viską.

  Eat it all up.

05

The Same Pair in the Past

The aspect contrast is sharpest in the past, where the imperfective looks at the process and the perfective at the result:

• Skaičiau knygą.

  I was reading a book. (process, perhaps unfinished)

• Perskaičiau knygą.

  I read the book (right) through. (finished)

• Rašiau laišką.

  I was writing a letter.

• Parašiau laišką.

  I wrote (and finished) a letter.

06

How to Learn Them

At this level, treat the prefixed partner of a verb as a closely related word that stresses "to completion", and learn the pair together - valgyti / suvalgyti, daryti / padaryti, skaityti / perskaityti. Over time you will feel which prefix goes with which verb and what extra direction it adds. Do not worry about getting every pair right now; just notice when a prefix has been added, and read it as "all the way / to the finish".