Ik was de borden af.
Ik wil afwassen.
Ik heb afgewassen.
I wash up the plates.
Yes. afwassen splits into af + wassen. In a main clause the prefix goes to the end: Ik was de borden af.
The perfect tense is "Ik heb afgewassen" — the -ge- slots between the prefix and the stem.
afwassen means "to wash up". Example: Ik was de borden af. (I wash up the plates.)
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