meet（过去分词）____ know（过去式）____ teach（过去分词）____ be（过去分词）____
meet（过去分词）____
know（过去式）____
teach（过去分词）____
be（过去分词）____
luckily（形容词）____
write（过去分词）____
good（比较级）____
difficult（最高级）____
wear（过去分词）____
saw（原形）_____