Breakdown of Het is noodzakelijk om de proef te herhalen.
zijn
to be
het
it
te
to (infinitive marker)
om
in order to
noodzakelijk
necessary
de proef
the experiment
herhalen
to repeat
Questions & Answers about Het is noodzakelijk om de proef te herhalen.
Why does this sentence start with Het is instead of the actual subject?
Het acts as a dummy or placeholder subject here. The real subject of the sentence is the whole action: om de proef te herhalen (repeating the experiment). Because it feels clunky to say "Repeating the experiment is necessary" in Dutch, we use Het to get straight to the point (Het is noodzakelijk...) and push the long action to the end of the sentence.
Why is de proef placed between om and te herhalen?
This is the strict word order for an om ... te clause. The word om starts the phrase, and te plus the full dictionary verb (te herhalen) act like a bracket at the very end. Any objects or extra details—like de proef (the experiment)—must be sandwiched in the middle.
Does de proef only mean "experiment"?
It means "experiment" in a scientific context like this one, but it is a very versatile word. It can also mean a "test" or a "trial". You will frequently see it in everyday compound words, like het proefkonijn (the guinea pig / test subject).
The word noodzakelijk is quite long. Is it built from smaller words?
Yes, breaking it down makes it much easier to remember! It comes from de nood (the need or emergency) and de zaak (the matter, thing, or case). Adding the common adjective ending -elijk turns it into a word meaning "necessary"—literally, a matter of need.
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