't kofschip

Use the rule of 't kofschip to find out if the verb ends in te(n) or de(n): Is the last letter of the stem in 't kofschip? (o and i are out). If so, the verb ends in te(n). If not, the verb ends in de(n).

Or use the rule of 't kofschip to find out what is the last letter of the perfect participle: is the last letter of the stem in 't kofschip? (o and i are out). If so, the perfect participle ends in t. If not, the perfect participle ends in d.