We begin our grammar journey with verbs, as in natural language acquisition and learning. Shapes of time may work as head verbs or auxiliaries. Verb auxiliary roles are marked in green, and verb head roles are in color mauve.
When verbs head verb phrases, they tell that something or someone is or happens. When they are auxiliary, they always require another verb.
Auxiliaries can build language Aspects, as the Simple, Progressive, or Perfect, feel welcome to ■SUB-CHAPTER 3.1.
We could say,
I am a learner.
The form “am” is a head verb.
We also could say,
I am learning.
The form “am” is an auxiliary verb.
We could say,
I have a grammar book.
The form “have” is a head verb.
We could say,
I have learned grammar.
The form “have” is auxiliary.
In our language journey, pronouns and nouns are ink blue. Highlights are forget-me-not, blue. We avoid color red, as it usually comes with prescriptive opinion on language. Naturally, everyone is welcome to devise own code.
Language forms allow virtual words. These are probably best — and natural — to exercise language structures.
