meet（过去分词）____met
know（过去式）____knew
teach（过去分词）____taught
be（过去分词）____been
luckily（形容词）____lucky
write（过去分词）____written
good（比较级）____better
difficult（最高级）____the most difficult
wear（过去分词）____worn
saw（原形）_____see
meet（过去分词）____ know（过去式）____ teach（过去分词）____ be（过去分词）____