Is the girl walking up the hill?
No, she isn't.
Is the girl runnig down the hill?
Yes, she is.
Is he sailing across the river?
Yes, he is.
Is he playing in the sand?
No, he isn't
is she running across the bridge?
Yes, she is.
Is the girl playing on the sand?
Yes, she is.
Is he walking across the bridge?
No, he isn't.
Is she running up the hill?
Yes, she is.
Is he walking along the path?
Yes, he is.
Is she sailing across the lake?
Yes, she is.
Is the boy jumping on the leaves?
No he isn't.
Is the boy climbing in the forest?
Yes, he is.