6.
1) A dog can jump
2) A fish can't run
3) A dolphin can swim
4) A chimp can climb
5) A rabbit can't sing
7.
Alex
He can't jump like a frog
He can't sing
He can't dance
He can swing like a chimp
He can't fly like a bird
Mary
She can jump like a frog
She can sing
She can dance
She can't swing like a chimp
She can't fly like a bird