't Kofschip
The 't kofschip (, the merchant-ship) or 't fokschaap rule is a mnemonic that determines the endings of a regular Dutch verb in the past simple indicative/subjunctive and the ending of the past participle. This rule should not be confused with the so-called T-rules (t-regels).
Read more about 't Kofschip: Rule, Silent Letters At End of Root