Breakdown of Säger du det, måste du knacka i trä.
du
you (singular)
det
it (neuter)
i
in
måste
to have to, must
säga
to say
knacka
to knock
trä
wood
Questions & Answers about Säger du det, måste du knacka i trä.
Why does the sentence start with the verb säger instead of an if-word?
This sentence uses a conditional clause that omits the word om (if). When you drop om, the clause starts directly with the verb. You could also write this as Om du säger det, but starting with the verb is a very common way to express if-statements in Swedish.
Why is it måste du instead of du måste after the comma?
This is the V2 (verb-second) rule in action. The entire first clause (Säger du det) counts as the first piece of information in the sentence. To keep the main verb in the second position, måste has to come right after the comma, pushing the subject (du) after it.
Why does Swedish use the preposition i for knocking on wood instead of på?
In Swedish, the idiomatic expression for knock on wood is knacka i trä. Even though you are physically knocking on the surface of the wood, Swedish uses i (in) for this specific phrase. Another common variation of this superstition is ta i trä (touch wood).
Can I use this verb-first structure to mean if with any verb, or just säger?
You can use this structure with almost any verb! For example, Regnar det, stannar vi hemma means If it rains, we stay home. Simply drop om and put the verb first to create the condition.
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