Breakdown of Käytä pipettiä tarkasti, niin kauan kuin mittaus jatkuu.
jatkua
to continue
käyttää
to use
tarkasti
carefully (closely, attentively)
kuin
than / before (in 'ennen kuin') / like / as
kauan
for a long time
niin kauan kuin
as long as
mittaus
the measurement
pipetti
the pipette
Questions & Answers about Käytä pipettiä tarkasti, niin kauan kuin mittaus jatkuu.
Why is pipettiä in the partitive case here, even though imperative commands usually drop the object marker?
It is because of the verb käyttää (to use). Käyttää is a partitive verb, meaning its object must always be in the partitive case. This requirement overrides the usual rule for imperative sentences (where the object would otherwise look like the nominative case), so it remains pipettiä.
Why does the sentence use jatkuu instead of jatkaa?
Jatkua and jatkaa both mean 'to continue', but they work differently. Jatkua is an intransitive verb, meaning something continues on its own without a direct object (here, mittaus jatkuu - the measurement continues). Jatkaa is transitive, meaning someone continues doing something (for example, hän jatkaa mittausta - he continues the measurement).
Why does the word tarkka (accurate) become tarkasti with only one 'k'?
Adverbs ending in -sti are typically formed using the genitive stem of the adjective. The genitive of tarkka is tarkan, which uses the weak grade (a single 'k' due to consonant gradation). By dropping the -n and adding -sti, you get the adverb tarkasti (accurately).
How does the phrase niin kauan kuin work to mean 'as long as'?
It translates quite literally to 'so long as/than'. Kauan is the adverb for 'for a long time', and kuin (than/as) links it to the condition that follows. It is a very common fixed phrase you can use just like 'as long as' in English.
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