Questions & Answers about De boom is snel gegroeid.
Why does this sentence use is instead of heeft for 'has'?
In Dutch, the present perfect tense is usually formed with the helping verb hebben (to have), but some verbs use zijn (to be). We use zijn for verbs that show a change of state or a change of location. Since growing is a change of state, groeien (to grow) uses zijn. That is why we say is gegroeid (literally 'is grown') instead of 'heeft gegroeid'.
How do we form the past participle gegroeid?
It comes from the infinitive verb groeien. To make the past participle for regular verbs, we add ge- to the front of the verb stem (groei) and add a -t or -d to the end. Because the stem groei ends in a vowel sound, it gets a -d, making it gegroeid.
Why are is and gegroeid separated by snel?
This is a core rule of Dutch sentence structure. In the present perfect tense, the conjugated helping verb (is) takes the second position in the sentence. The past participle (gegroeid) gets pushed all the way to the end of the sentence. Any other details, like how fast it happened (snel), must go in between them.
Why doesn't snel have an extra ending to mean 'quickly'?