Think-thought, pay-paid, sit-sat, leave-left, build-built, put-put, buy-bought, hear-heard, lose-lost, understand-understood;
Begin-began-begun, eat-ate-eaten, drink-drank-drunk, give-gave-given, run-ran-run, speak-spoke-spoken, write-wrote-written, come-came-am uitat, drive-drove-driven,take-took,taken, go-went-gone,know-knew-known;
