So whenever the yard is being watered, the ducks come to swim in the little pools.
(the yard; is being watered; ) (the ducks; come; to swim in the little pools; T:whenever the yard is being watered) (the ducks; to swim; L:in the little pools)
the yard the ducks the ducks
is being watered come to swim
to swim in the little pools T:whenever the yard is being watered
L:in the little pools