There are 2 kinds of verbs: Lexical verbs and Auxiliary Verbs
Lexical verbs are what we consider as 'normal' verbs, they reflect action like so :
I drink tea.
She ran the 200-metre hurdles race.
They thought about the proposal for a while.
The Doctor forgot about the appointment.
The others are Auxiliary verbs which are used in the forming of tenses, moods, and voices of other verbs. They are further divided into:
1) Primary - be, do and have
2) Modal - can, could, may, might, shall, should, will and would.
Lexical verbs are what we consider as 'normal' verbs, they reflect action like so :
I drink tea.
She ran the 200-metre hurdles race.
They thought about the proposal for a while.
The Doctor forgot about the appointment.
The others are Auxiliary verbs which are used in the forming of tenses, moods, and voices of other verbs. They are further divided into:
1) Primary - be, do and have
2) Modal - can, could, may, might, shall, should, will and would.