Part B: The
6. Perfective Mode
In English most of our verbs can be changed from the present
to the past tense by adding a suffix 'ed
work' becomes 'I worked'
becomes 'I stayed'
a similar change can be made in the verbs, so that words
with imperfective meaning may acquire perfective meaning.
As imperfective means the action or condition is still taking
place, perfective means that the action has been completed,
and is no longer taking place.
The perfective is indicated in two ways:
1. The addition
of a prefix.
2. The addition of a prefix and an alteration in the form
of the stem.
The choice of
the perfective prefix is not easily predicted, and there
is no basis for predicting the stem. Therefore most perfective
forms must be learned as new words.