There are three basic tenses - past, present and future. These three tenses have four forms - simple, perfect, continuous (also known as progressive) and perfect continuous.
Mountains are continuous.
It is continuous.
Continuous
They are continuous.
There are currently 88 known species of whales, dolphins, and porpoises that have blowholes, so there are potentially 88 blowholes in the world.
Yes all whale have blowholes because they are mammals.
All types of whales have blowholes because they need them to breathe. As we have noses, whales have blowholes. Porpoises and dolphins have blowholes as well.
Usually they have one Baleen whales have two blowholes. Toothed whales have only one.
No
no
They have blowholes.
No
1
Blowholes
2
so they can swim upside