There used to be a lot of frogs in this pond.
Frogs are afraid of snakes.
The frog inflated himself more and more, until finally he burst.
I can't distinguish a frog from a toad.
Let's return when the frog croaks.
The kid drew back from the frog when it moved.
A frog came out of the water.
He that stays in the valley shall never get over the hill.
The snake swallowed a frog.