This textbook explains mainly in colloquial form.

He is completely nowhere to be seen.

Her necklace was in the beautiful shape of a butterfly.

This sentence is using the inclusive form.

This grammar rule is using the exclusive form.

Exclusive form of grammar is used to refer to a specific object only.

Everyone, please have a good new year.

Excuse me, may I come in?

The characteristic of annelids is that their bodies are divided into ring-shaped segments.

This butterfly valve is used to control the flow of fluid.