Is 'Ik vergat het tweede drankje' acceptable in Dutch?

Yes, "Ik vergat het tweede drankje" is grammatically correct and understandable, but it is not the most natural choice in everyday Dutch. Native speakers almost always use the perfect tense with "zijn" for "vergeten" in this context: "Ik ben het tweede drankje vergeten." The simple past ("vergat") can sound a bit formal or like written narrative, especially when talking about a specific recent event like forgetting a drink. So your sentence is acceptable, but the perfect tense version is far more common and will sound more natural to a Dutch ear.

This is not a Duolingo quirk; it reflects a genuine preference in Dutch. While English uses the simple past ("I forgot") freely for recent events, Dutch strongly favors the perfect tense ("Ik ben vergeten") for actions that have a present relevance or just happened. The simple past is reserved more for storytelling, past habits, or events clearly separated from the present. For example, if you were recounting a series of events in a story, "Ik vergat het tweede drankje" would fit. But in a casual conversation about what happened today, "Ik ben vergeten" is the go-to.

Here is the honest tradeoff: using the simple past might not be wrong, but it can subtly mark you as a non-native speaker or give a slightly stiff tone. On the flip side, overusing the perfect tense can make your Dutch sound too informal or repetitive. The best approach is to observe how native speakers talk about past events in different contexts. Listen to Dutch podcasts or watch shows; you will notice that for everyday, recent actions, the perfect tense dominates.

For your next step, practice swapping the simple past and perfect tense in sentences about your day. For instance, say both "Ik vergat mijn telefoon" and "Ik ben mijn telefoon vergeten" out loud and notice which feels more natural. Use the perfect tense as your default for recent, personal experiences, and reserve the simple past for when you are telling a longer story or describing a past state. This will help you sound more fluent without forcing a rigid rule.