sharks swim more quickly than people改否定句和疑问句
Sharks don't swim more quickly than people.
Do sharks swim more quickly than people?
sharks have big teeth.改陈述句和疑问句
是否定句吧：Sharks don't have big teeth.
Do sharks have big teeth?
pandas walk more slowly than people.改否定句和疑问
Pandas don't walk more slowly than people.
Do pandas walk more slowly than people?