Breakdown of Der Bus ist plötzlich abgefahren.
sein
to be
der Bus
the bus
abfahren
to depart
plötzlich
suddenly
Questions & Answers about Der Bus ist plötzlich abgefahren.
Why do we use ist here instead of hat to say the bus departed?
In German, the spoken past tense (the Perfekt) usually uses haben (to have) as the helper verb. However, verbs that describe a change of location or a change of state use sein (to be) instead. Because the bus is moving from one place to another, we use ist.
Why is the ge in the middle of the word abgefahren?
The dictionary form of this verb is abfahren (to depart). This is a separable verb, made of the prefix ab and the base verb fahren. To form the past participle for a separable verb, the -ge- is placed right between the prefix and the base verb, creating abgefahren.
Why does abgefahren go at the very end of the sentence?
This is a strict rule in German word order! When you use a two-part verb structure like the past tense, the helper verb (here, ist) takes the second position in the sentence, and the past participle (abgefahren) is pushed all the way to the very end.
Can I use abfahren to say that I am leaving a party on foot?
No, abfahren is specifically used for vehicles (like buses, trains, or cars) departing or driving away. If you are leaving on foot, you would use a different verb, such as gehen (to go or walk) or weggehen (to leave or go away).
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