Frogs are able to swim with the help of a tail during the tadpole phase.
(Frogs; are; able to swim with the help of a tail during the tadpole phase) (Frogs; to swim; with the help of a tail during the tadpole phase)
Frogs Frogs
are to swim
able to swim with the help of a tail during the tadpole phase
with the help of a tail during the tadpole phase