We stappen in de bus in.
Ik wil instappen.
Ik ben ingestapt.
We get on the bus.
Yes. instappen splits into in + stappen. In a main clause the prefix goes to the end: We stappen in de bus in.
The perfect tense is "Ik ben ingestapt" — the -ge- slots between the prefix and the stem.
instappen means "to get on (board)". Example: We stappen in de bus in. (We get on the bus.)
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