1. greedy
　　He ate his dinner greedily.
　　比较级 He ate more greedily than usual.
　　最高级 He ate the most greedily.
　　2. loud
　　She played the radio loudly.
　　比较级 She played her radio more loudly than usual.
　　最高级 She played the radio the most loudly.
　　3. fast / slow
　　Monkeys run fast.
　　Hedgehogs walk slowly.
　　Snails crawl very slowly.
　　比较级 Cheetahs run faster than hedgehogs.
　　Hedgehogs walk more slowly than cheetahs.
　　Snails crawl more slowly than hedgehogs.
　　最高级 Cheetahs move the fastest.
　　Snails move most slowly.